Had this for a month now and I have not had any issues. I was not sure what to expect based on other reviews, but since it was prime eligible I figured what the heck.No issues with machine out of the box. Brand new.Easy set up. Smaller than i expected which is great Takes up less room. Still plenty big cleaner and steam reservoir. Clenaed about 15 peices of jewelry first time and did not run out of steam.Ultrasonic sounds good. I have no way to measure the frequency of the cleaner other than it sounds just like the full size machines I use to clean guns. The dog left the room as soon as I turned it on, so it seems to actually use ultrasonic waves, not just vibrating like some cheap machines do.Steam works great, a little residue with the first spray, but that should be expected. Very controllable valve for regulating amount of steam. Push down all the way and the jewelry flies right out of the tweezers.(Close nearby drains, don't ask why)Cleans just as well as taking it to the local jeweler. I used some Blitz cleaner concentrate, just a little in the water to help clean and it worked perfect. Little blast of steam after that and perfection.The only downside is that it is so easy and fast, less than 10 min from turning it on to done that my wife wants her earrings and ring done every week. Had to find a place for it to stay out instead of emptying it and storing it.