I don't own any Snap-on, I wrench on my car at home. However over the years I have been buying some inexpensive tools from Kragen/Pep Boys to supplement my Craftsman collection.

I own a mid-80's Mercedes diesel that occasionally requires a special tool. I perform most of my own work on that car. There are a couple of areas that require me to cobble together a tool rather than buy the expensive Snap-On or Stahwille or Hazet. No one has mentioned Hazet a fine German manufacturer, Snap-on's equal for sure. The oil cooler lines need a 22mm (I think) open end and a normally 22mm wrench is too long and hits the oil filter housing. I bought an inexpensive 22mm and cut the open end off. It works fine and is much less money than an expensive 22mm crow's foot.

I also have a 10mm combo wrench of which I ground down the open end. It now fits into tighter spots.

The 14mm Proto hex head drive I bought at Grainger fits the drain and fill holes on the rear end. Sears didn't make one that big.

The less expensive metric sockets and combo wrenches I bought aren't quite as nice as the Craftsman, but I haven't broke one yet.

The Hazet tools my one mechanic owns feel real nice!