This electric battery-powered mower replaces a SunJoe mower that died. This lawnmower is much more powerful and efficient. It was very easy to put together out of the box, with minimal assembly. While the instructions' images could be clearer (true for virtually every product coming from China), I figured out how to operate it and was quickly in business.I now have used it for over a month and can say it's a reliable, efficient machine. It's fairly heavy and requires some force to turn on hills and curves (which I have on my front lawn), but the self-propelled feature makes the overall job much easier and faster. The batteries hold enough charge for me to cut my lawn 4 to 5 times before having to recharge--a big upgrade from the SunJoe single battery which barely lasted a single cut. The unit runs fairly quietly for a powerful machine. I like that no mulching bag is required (though it comes with one as well as a side chute); the cuttings fall out the back and don't clog up the exit chute.Downside: I have not yet had to remove and sharpen the blade, but that's something that should be explained much more clearly with graphics, and as a result I have to ask a friend who's very handy with this kind of stuff to assist me, and I have to purchase new tools to do this--it would be a much better value if the unit came with all the tools necessary to do maintenance. For that I would have given the overall score 4.5 stars, not 5.