I thought the Saturday tasting menu production at Petra and the Beast was great. That being said, I'm thinking the best way to check out the place if you haven't been is to BYOB on non-Saturday a la carte days - grab a charcuterie board and whatever strikes your fancy on the menu.
Which is not to say you would go wrong with the Sat. tasting menu for a solid date nite or special occasion.
I'd also recommend it to anyone who just wants to get in better touch with their eating habits. Six courses + a snack is not lots of food, and there were times when I just wanted a piece of bread to sop up some of the sauce, and unconsciously fill my belly. I intentionally went for a long swim before hand to get myself good and hungry, and my little one (it was a birthday gift) and I looked at each other during the 4th course and said -- this is interesting -- I'm not hungry but I'm not full. It made lots of sense because you really do concentrate on each serving.
By the last course, however, I felt satisfied and not hungry, although I didn't have the bloated feel I sometimes get at places with big portions and lots of fillers.
The stuff is all very "surprising" -- what the hell is that flavor with some really cool textures - which is what you would expect given the reviews of this place and the price point.