Mr. M, I usually avoid the major brand BBQ sauces for one of the more local brands. Usually, I use Jack Miller's, it has just about everything in it already, like onion, garlic, stuff like that. Dump it and the ribs - I like pork country-style boneless ones - into the slow cooker, set it to rock-n-roll for 5-6 hours, and eat, usually with a potato salad and lots of iced sweet tea.
It just don't get any better than that.