Thread: Ultrasonic cleaner - Research

I'm looking to buy an ultrasonic cleaner to speed case prep up.
My research shows:
- Price varies from $80 - $700 with a cluster between $100 - $200 on TradeMe
- GunCity Accu $300
- Volume varies from 800ml to 32 litres!!
- Watage varies from 40 - 140w
- Frequency seems consistent at 40mhz

So what's the deal?
Are the cheap n cheerful ones good?
Is it a pay once, cry once expensive thing?
What volume & wattage are you using?
What's your recommendation?
Which are the crap ones to avoid?