I have found Snap-ons and Mac break less then Craftsman. But I have only broken like 5 things from them, and taken them back to be replaced everytime. So the cost difference is great for me. But then I only use them to work on my vehicles, and not all the time, so it is all good for me. Hell I even bought the torque wrench that is guaranteed for life (Not all of the Cman ones are). About once a year I take it back and get a new one so I know it is still calibrated correct, or atleast close.
Craftsman are great tools IMO. Just because of a no questions replacement, and if they do ask, just say "I don't know". Snap-on seems to be the best I have ever seen...Mac suck. The only time you find out how good your tool(s) are, is when you have a really TIGHT bolt/nut to break loose.