for the price the product is good. I got the 30L and have used it for enginge parts, carburetors and tools and have used it for many days now.
my only disliking is that this is a 40HZ cleaner, for this big size 40Hz is not aggresive enough to get dirt of such big parts and so much water that is in this cleaner. you have to run the part many times to get it clean. especially carburators and engine gunk
i have 2 10L machines where one is 24Hz and one is 40Hz and both os theese does a better job than this big one. i use the same detergent/soap in all my ultrasonic cleaners.
but again, for the price and size you can't beat it! so for me it's a 3,5/5 stars
CSTAMA 
