I've had one for a year or so, but then about after 15 months of use, the battery stopped recharging. The battery is a weak point on these things. Replacement batteries are about $100. I never bothered getting one.
I was pretty happy with the machine's performance when it was working. Keep in mind that this is a sweeper, not a vacuum. It only has a rotating brush that sweeps up debris. There is no suction whatsoever. It does a decent job on small things like dust and pet hair. I scheduled it to do a complete cleaning of my entire ground floor every 3 days. That eliminates the need for me to use a broom. All I have to do is mop the floors. I was not impressed with the machine's job on area rugs. It didn't pick up most of the debris that was on it. If you have a lot of area rugs or carpet, I don't recommend this machine.
Also, when it is on, it is quite loud. It's as loud as a normal vacuum cleaner. You can let it run as if you were doing your vacuuming. But keep in mind that it takes about twice as long to do the same square footage.