I haven't done the Obagi Blue Peel but have heard loads of good things about it from other ppl. I did a standard TCA peel instead which is pretty similar, made my skin look amazing and really really smooth. Only downside was having to stay indoors for over a week whilst my face peeled off. Try the MakeMeHeal site 4 reviews and more info on the procedure. Also, found a day-by-day review here, gives u an idea of what to expect if u decide to go thru with it:
Obagi Blupeel First day of a chemical peel