The price is pretty good compared to other stationary Pedal Exercisers. I am in currently in physical therapy after a full knee replacement and have a full size stationary bicycle with all the bells and whistles which for me is too bulky to use and make needed adjustment to the chair right now. I need to adjust the distance between the pedals and my chair several times during each session as my knee loosens up. I can sit in a comfortable chair and since it is not heavy I can make the needed adjustments by simply pulling the exerciser closer with one hand. I can feel the burn in my thighs and legs as well as exercising my knee so it is a workout. It is well made and pretty sturdy and has a thick finish that protects it from scratches which matters to me. The pressure adjusting knob works pretty good but is not really needed if you are looking to exercise your legs and bend the knees.

The only drawbacks are: that the foot straps are only adjustable to two sizes and both are too large for my feet. I fixed this problem by wearing a fluffy pair of socks. and: The exerciser is not very heavy so it moves away a little at a time when I am using it so I have to stop and adjust the distance every so often which is no big deal. It is a good purchase for the money, I definitely recommend it.

Easy to assemble exercise indoor bike pedals

I have reduced circulation in my legs. I was ordered by my doctor to put on a fitbit and walk several miles a day and do so many flights of stairs. Neither of which my knees appreciated nor did I at 2 am when the weather was bad and my only option was to walk or take a bunch of really nasty medications that still didn't fix the problem.

I've tried treadmills and stationary bikes and not liked either. Someone recommended this very unit. Salvation.

Lightweight and it does come in parts, but easy to assemble. It fits under the coffee table. The stirrups do have a couple of snap notches for adjusting. I put this next to the couch, slouch a little, put on the earbuds and fire up my tablet and start in. The range of motion is excellent and easy to do-very little effort. It has resistance but I have it 'free' mode because what I need is the muscles to move and naturally force the accumulated fluids and that back out. This does it with minimal impact to my hips, knees, and ankles. It is almost mindless to get it started and just pump away until the legs feel better. No more restless legs and that strange ache. I don't push it hard or fast, but at a moderate steady pace. It's not really sturdy enough for fast or hard, but for what I do need, it's perfect.

Best investment of ($17.06 plus tax when I bought it). I don't care about fancy, I just care about results. It has given me back a lot of sanity. No more doing that strange bouncy bit with the legs (fidgeting on steroids). No more walking in weird weather. No more something taking up that much space and I hate using it. I give this five of five stars and two of two legs.

I need to go on a long trip soon and it will come apart and fit in a suitcase-it will be a bit of a space eater but it will break down to fit in one of my wheeled suitcases. Win-win.

This worked perfectly for physical therapy purposes.

Although the description states "Comes completely assembled", mine came in 3 pieces that have to be put together. However, it doesn't look like it will be complicated or difficult to assemble. For the $21 I paid for it, it appears to be sturdy and of decent quality. I can't take time to put it together until after work, so I'll update after I've had a chance to use it. 4 stars is because the description is misleading about coming already assembled.
UPDATE: 8/15/14
The product was simple to assemble, and took me less than 3 minutes, and required no tools. It seems to be quite sturdy.

I've seen some reviews where people were disappointed because they "didn't work up a sweat", but that is not what this is for. This product is just to allow you to keep moving throughout the day, while you are doing other things. You'll burn a few more calories and improve your circulation, not to mention getting more oxygen to your brain, all while not working up a sweat or getting out of breath. The tension can be adjusted to obtain a slightly harder workout as well.
My only problem is that my desk is a little short, so my knees hit the desk. That's not a problem with the product. I simply shifted my chair back a couple of inches and that solved the problem.
I will use this while watching tv, crocheting, or surfing the web and I'm measuring my work desk to see if I might even be able to use it while at work.
It's easily worth $21!