Does anyone know anything about ultrasonic cleaning machines for jewellery?

[MrsFogi]

I'm thinking of getting one so......Does anyone use one? Are they any good? Are there any downsides? Are there features to look out for? Anything else I should know?

Oooh yes I do

They're basically good for jewellery with settings. The sonic feature on it basically vibrates and loosens all the rubbish from your jewellery.
Particularly good for rings.

It should have 2 sections, one for your jewellery cleaner and the other for water to rinse it in.

Just note though, you shouldnt put Emerald jewellery or Opals in.