The one we use is a home spun thing. It has an upper area (plate) that the part sits on, and the return is just a seep arounf it that is where the solvent returns to the reservoir.
It's great, the solvent is filtered. Turn on the switch and you have flowing solvent when you want it. I usually use a plastic gallon ice cream or butter tub to fill and then soak things, or just so i don't forget to turn it off.
Most of the cleaning is still done with a brush, but having it as a central place to do your cleanup and splashing around is great, instead of using assorted pans and whatnot. No more mess mess everywhere, just one spot. I think if you do much tearing down of anything greas and YOU HAVE SPACE TO PUT IT, it is something you wouldn't want to do without.