One of the reasons I loved Qvault/Bootcamp/Destroyer is because they offer a little of both. If you do one Qvault test a day for each subject, then supplement it with some additional Destroyer/ Ferallis' Notes review (dammit, I didn't pay attention in that thread so I dunno if I'm spelling it right), I think that gives you the best of both worlds. If you review the answers to both questions you got right and wrong, you'll be fine. Qvault/Bootcamp/Destroyer all give WONDERFUL explanations to their questions, and I'm sure you'll learn a lot from those three sources (although Bootcamp should be used more as a litmus test on how you're doing! Still, review your answers after every practice exam).