I've just begun to use this mower, and so far it's quiet, light-weight, relatively easy to adjust and clean, and it does a good job.
Since it's very simple -- essentially a push-reel mower with an attached battery -- there's not much that can go wrong. The only reason I gave it four stars rather than five had nothing to do with the mower itself. It became clear from the owner's manual and other documentation I reviewed before assembly that this mower was made for the European market. The English portion of the directions was geared towards Great Britain, and the nearest service center to U.S. customers is in Canada.
Regarding the battery, the supplied charging transformer appeared to cover a wide range of voltages, so I thought it would be safe to plug in; however, I would have been more comfortable had they put in an insert stating that it was appropriate for U.S. 110V outlets. It took slightly longer to charge at first than the six hours stated, but the 25V lithium ion battery fully charged was enough to mow the front and back yards of two medium sized homes without showing any slowdown. I even went over one of the lawns twice because I needed to adjust the height of the cut. So power and battery life were excellent.
The hook for the grass catcher slipped off the handle a couple of times, but that was an easy fix by bending the curve of the wire hook tighter with a pair of pliers.
As long as the battery lasts, I like this mower very much. I'm a petite, out-of-shape, senior female, and I have absolutely no problem pushing this light-weight mower. I believe it would be ideal for senior citizens. The handle folds for storage, and it is easy to clean with an auto detailing brush.