I tried without success a dozen times to put the chair together. The holes for the seat never lined up with the holes in the legs. Despite all the comments about "easy to assemble" it seemed impossible! The legs were simply too far apart to allow the seat to properly sit over the holes in order to fasten it in place. Then I realized the center wood block that connects the two legs had a little sticker saying "up' on it. I had it facing down. I removed it and reattached it with the up label facing up. That did the trick!

I had been wanting one of these kneeling chairs for a long time. I injured my back recently and decided to bite the bullet and buy one. This arrived earlier than expected and was pretty easy to put together (tip: as with many items, only loosely attach the screws until you get the parts aligned, then tighten!). It's a beautiful little piece of furniture - very sleek and modern. The quality is lovely. When I sat on it, it was fantastic for my lower back - took the pressure right off so there was no pain at all, and gave me great posture. Unfortunately, I have wonky knees that don't like to be bent for very long - it's extremely painful when I straighten them back out. Sadly, my knees are forcing me to return it. I wish so much this worked for my entire body!

Everyone knows that all day sitting is horrible for the body. I have been using my new varier balans chair for about a week now. I put it together myself very quickly and easily. Remember to save the little allen wrench and place it in the storage pouch on the underside of the chair. They say after two weeks you should tighten the bolts once more and then whenever you need to thereafter. This chair has been an adjustment for my body. I got it due to horrible back pain from sitting in a traditional office chair doing computer work.
In the varier chair you can rock back and forth which I do quite a bit now, especially to music. This promotes constant movement/healthy fidgeting. I also change position with my shins on the pads and prop my foot up on the shin pad (this also opens the hip flexor)...basically there are many combinations of how you can sit in this chair and the whole point is to not maintain the same position for hours which is much better for your body. My shins tend to get a bit sore if I leave them on the shin pads for longer periods but I think it's just getting used to the chair still.
My back no longer aches at the end of the work day which is a problem solved. Be sure not to slouch or hunch over in the chair. The curvature of the seat pad does not promote this but you can hunch if you really want to. If a person is super tall or shorter I'm not sure how this chair will fit....for reference I'm nearly 5'6 and it seems fine for me and easy to get in and out of. I read online that you can also turn the chair backwards and sit on it that way so the combos are pretty vast in how to use it. I highly recommend regular rocking back and forth to do a bit of spine 'massage' and flexion. Bottom line - if you're unsure, try it...worst case you give it a few weeks and return if it's not the right fit for your body.

A direct comparison to:
https://www.amazon.com/Luxton-Home-Ergonomic-Posture-Padding/dp/B089K5ZVVR/ref=sr_1_1_sspa?crid=G0MO0PLC229H&keywords=kneeling+chair&qid=1665684855&qu=eyJxc2MiOiI1Ljg0IiwicXNhIjoiNS42NSIsInFzcCI6IjUuMTMifQ%3D%3D&sprefix=kneeling+chair%2Caps%2C107&sr=8-1-spons&ufe=app_do%3Aamzn1.fos.f5122f16-c3e8-4386-bf32-63e904010ad0&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExTVlOSU1CVUhKVVdKJmVuY3J5cHRlZElkPUEwMDI2MzcwNkc2OVgxQzhNWk9VJmVuY3J5cHRlZEFkSWQ9QTAyNzk4MjlUU0oxVFRVQjVZOFYmd2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl

Expensive chair (this chair - $350ish)
Cheap chair ($140ish)

I bought this and the $140 kneeling chair at the same time and made a direct comparison. Here are my findings.

Wood:
The expensive chair has thicker wood. The cheaper chair's wood is the same width, but about 2/3 the height thickness, suggesting it would support less weight or wear out more quickly.

Padding:
Expensive chair has thinner, but denser padding. Cheap chair has almost excessively thick padding that quickly flattens out as soon as you sit on it. My main concern is that the padding on the cheap chair will go completely flat after a year or so. Only time will tell.

Fabric:
Material on both chairs seems to be reasonable quality and not likely to rip or pop seams any time soon, but the fabric on the more expensive chair is rougher and a bit abrasive on bare skin after sitting for a while.

Support bars:
The expensive chair has a single support bar in the back but is surprisingly sturdy. I thought the knee supports would be very wobbly but are actually sturdier than the cheap chair with the additional cross bars. I am very disappointed in the placement of the cross bars on the cheap chair because I sometimes pinch my toes under them as I rock. It seems like a no-brainer to avoid them, but when you are sitting in it all day working from home, it happens more often than you'd think. Additionally, the cross bars create more contact points with the floor which could cause problems on hard wood.

Assembly:
I encountered the same issue on either chair which is easily resolved. Don't tighten all the screws before you put the main seat on. Leave some wobble so you can set it on the pegs and guide the screws in more easily, otherwise it will be difficult. I had no other assembly issues. Most complaints about assembly are probably written by mechanically incompetent people. You really don't even need instructions to put these chairs together.

Rocking Motion:
The more expensive chair seems to have a wider and smoother rocking range. The cheaper chair tends to lean you forward a bit more keeping your center of gravity forward with more pressure on the knee supports. I hate to say it, but this single factor is what wins for me on the cheap chair since it is better for my back. The only way for people to really know what will be best for them is to try them.

Other features:
The angle of the seat and knee supports on the more expensive chair feel about perfect, whereas the cheaper chair's seat feels angled forward a bit too much putting extra pressure on your tailbone area. I suppose the angle adjustment would feel different from person to person though.

The more expensive chair comes with adhesive felt strips to put under it for use on wood floors, where the cheap chair comes with nothing. While using the cheap chair, I rolled over a small pebble (something hard) which pressed and lodged itself into the chair's wood. Every time I rocked on it until I discovered and removed the pebble, I scratched and damaged my wood floor.

On either chair you should tighten the screws periodically as they tend to come loose with use, but the cheap chair's screws seemed to come loose more quickly with the same use.

The more expensive chair has a place to add an optional backrest (for $150 more), but the cheap chair does not.

Neither chair has height adjustability, but either are adequate height for use at a normal height work desk. Some of the non-rocking chairs I have had are too tall when using wheels.

Overall impressions:
The expensive chair is superior in material quality and overall function in every way to the cheaper chair. The only question is, is that quality worth the additional $200+?

I used a kneeling chair at my mom's friend's office in the late "˜80s and wanted another option for my home office to start actively sitting a bit more during the day.

SETUP - The directions are IKEA style with little guidance in a few areas. Don't tighten the first 4 screws that put the base together before you put the seat on. The seat appears to be directional - look at the picture closely. I'm not sure it would actually make a difference but might as well try. The knee pads aren't directional as far as I can tell.

STURDY - I intentionally selected this kneeling chair because of the knee flexibility. I didn't think about it then feeling more wobbly. I'm hoping it's the right decision and I'll get used to it but it does feel a bit unstable right now.