Owned since June 2019, 2 1/2 acres w/ a lot of the acreage in need of spraying. Worked w/o incident since ownership. Love not having to pump for the entire yard as I used to do w/the old Pump Sprayer. Wife wasn't sure it was worth the $ or that it would hold up. 4 years in & still going strong & she'll even volunteer to spray as long as I help her get the tank on. W/a full tank, it's rather heavy for her to wrestle it on her back.
Found a "replacement" battery (actually the exact same battery) @ thefountainheadgroup (NOT AFFILIATED in ANY way) for $88.00. Couldn't find one anywhere else, seems to be the one down side. No other issues as of this posting.

Well built unit. Made spraying very convenient. Good value for the money. Decent variety of nozzles come with the unit. Battery has plenty of reserve power to cover large area.

Put 4gal of chemicals through it to coat the outside of my house in pesticide since Mississippi is heavy on the bugs. Also allows me to keep the dog in the house for the night while the chemicals dry and seap in. Took two fills, even though the bottles I was using were 1.4gal, I was mixing two brands together. Anyways, two refills, 2560-3200 sq feet covered with the fan tip on took less than an hour to cover the whole house (it's a rather large house, 4700sqft, 3200 is the wall coverage, did 8-10ft up since I don't really have a huge upstairs bug problem). And I was being rather liberal with the usage. Would say the range was rather well maybe 3ft max and a decent amount of pressure too. Will definitely be using this to weed kill also.

Clean up was easy. Didn't do it as suggested. Filled the canister up 3/4 water after pumping the last bit of pesticide out. Closed it, swirled it around, and then dumped the water out. Filled it up again, practically full this time. Turned on the device, locked the wand into position, and ran it until it emptied, which takes about 20-30 minutes at the full 4 gallons.

There are, however a few things of annoyances that could make this a better product:
1) put the switch on the handle or the strap, since as it is now, you kind of have to have it off to turn it on.
2) I didn't notice a battery indicator anywhere, which would be nice, preferably on the handle of the wand. You know 3-4 tiny leds.
3) Belly/waist buckle also.

Final thoughts; I like it. I like that the battery compartment is nice and large meaning you can easily store the extra tips in there so as to not lose them. I assume that's why there is so much space in there. The padding while not a lot, is actually sufficient. The nearly an hour of use with it, didn't feel like anything was digging into my skin or had to readjust ever. I thought I only paid $75, must have been thinking about the manual ones that I looked at. SO, at this price of nearly $160 those suggestions should easily be implemented in the next iteration. I like it, was amazed how quickly it allowed me to take care of the house and really coat it in 4 bottles in such a short time. I also failed to mention the pressure release valve, wished it was a little more obvious what it was, dye it red or something, or make it more button like. I intuitively figured it out, but it's not super obvious. It was only because it was impossible to screw off the lid due to the pressure build up. Good product.

Note to Amazon: What's the deal with your "rate features"? 9 times out of 10, most of them are irrelevant options. How is "sheerness" and "thickness" relevant here? So strange.

This has changed my lawncare game. It makes it so easy to now spray my medium/large yard. It used to take me all kinds of time and trips back to refill. Now I don't even have to pump! The spray is consistent and the battery last a very long time! I would highly recommend.

After changing the battery as instructed, I have sprayed several gallons without having to recharge the battery. Started working as soon as I flipped the switch. No problems so far. Really like not having to pump all the time. I would recommend buying this sprayer.