I recently bought a Thompson puffer drywasher, and had to correct a couple of minor issues detected once I had set it up and ran it for a bit. Great machine with the electric motor, and quiet enough to not hate after an hour.
It's lightweight compared to most depending on your battery choice, and it keeps the fine materials well trapped in the riffles.
I think it's a good solid piece of mining equipment that will last a long time with minimal care.
Cheers!
Jim McBride