Got to agree with Zak, the tank isn't very big so you wouldn't get much in it.Probably fine for cleaning air-brush parts but I get on fine with a solvent cleaner if the brush is clogged with dried paint.
Nice to have if you have money to burn but for me, an expensive luxury. There's also a small risk that it could dissolve PVA if you want to clean an assembly, depends on the cleaning agent you put in. Used 'em a lot in engineering on assembly work.
Haddock.