I had my doubts about this... or any ultrasonic cleaner for that matter...
It was a good price though so I thought I'd give it a try.
I'm happy I did. I put several pieces of jewelry in it, Things I generally never take off on the daily. They were fairly dirty.
I put it in for 2 cycles of 2 minutes and they came out sparkling! That was just with plain water. I didn't add any cleaner at all.
Next time I will try with a cleaning solution to see what that does. I can't imagine I won't be pleased considering how well it worked.