I own several ultrasonic cleaners including some high end units from Elma, Crest, Branson and L&R. I also have that HF cleaner.
The problems with the HF "toy" cleaner are:
- Very wimpy/slow heater, no thermostat
- Very short cleaning cycles. (need to keep resetting the cycles)
- Poor quality fan with short life
- Cheap plastic case, prone to leaking at the seam.
- Very small tank
- Plastic basket - absorbs ultrasonic energy
If you want a budget cleaner, spend a few bucks more and get this one for around $100 on Ebay.
- It's 6 liter and all stainless steel including the basket/lid. (plastic baskets absorb ultrasonic energy and should never be used)
- It has mechanical controls. (don't get digital/touch screen on these low end units)
- The heater is 300 watts which is pretty reasonable for a 6L unit. (it's 6L digital counterpart only has a 180 watt heater). Heat is invaluable in cleaning effectiveness.
- It has a 3 transducer design for 180 watts ultrasonic power.
- I believe the OEM is Beijing Ultrasonics. You can replace the generic ultrasonic driver circuit boards if you ever need to.
- I took it apart and it looks like a very good design. Same gauge stainless steel tank as my Elma which was 20X the price.
I bought this exact unit as a spare and it does a great job. However it's pretty noisy!! (the high end units tend to be much quieter)