I have no problems with pep boys if I have to use em, but I prefer buying my parts OEM, not aftermarket wherever possible.
But you can't go wrong with lifetime warranty Pep boys alternator, water pump, or starter motors.
Used them to those on my jeep, and they have lasted perfectly well, and have that lifetime warranty, so if they ever break, all you pay for is labor.
But when it comes to my benz, unless its an emergency, the parts don't get bought at pep boys.
Alon