You won't regret it! It's the first marinade I really remember using / friends using, plus it was one of the Weber founders favorites even though some advise against it.
I'm not sure I'd compare it to the Roadside marinade but it's pretty good. The salad dressing (Wishbone Italian) seems to be decently healthy too; I don't use it on salads very often but I seem to keep 2-3 bottles on hand.