Don't agree with you on that mate. The small US cleaners are pretty good. If they work at 44khz there is no difference with a big expensive one when it comes to cleaning power. Off course no heating, the cycles are shorter and less personalisation options but the US power is on par. It's the solution you use in the cleaners and the way you position parts that makes the difference. For a few bucks these cheap US cleaners are great entry tools for watch cleaning.