I posted the best of my knowledge regarding your questions here showthread.php?t=9582
These products are great and you can build an entire functional site very fast if you fully understand how they work and how to implement them. The WA guys here in the forums are an awesome help, but if you are up against a tight deadline and unfamiliar with these products you could be in trouble. For a novice like me, they took a while to learn and I still don't fully undertand all of their functions.
My 2 cents: I have used and would probably suggest the WA mentoring session option. You can get done in a couple hours what might take weeks struggling through on your own. AND YOU LEARN A LOT.... FAST! It can be a bit expensive, but if you are faced with letting down a client it may be worth it.
Good luck Paul!