As a heavy equipment mechanic, I'd have to say Snap On tools are very good. That being said, I would only spend the money on the specialty tools. for instance, the Snap On offset wrenches have a slightly different offset angle that gives a few extra degrees of sweep in tight spots. Any of the guaranteed lines will probably work fine for you, just find out how the warranty works. If you have to mail in the broken tool, forget it.

I guess I just see Snap On tools as mechanic's "Bling".