This place is hard to find. Tip: its outside of the Venetian. Also if you ask for directions, then make sure to say Bouchon Bakery not Bouchon Bistro. It's a cute small shop with fairly friendly customer service.
Food-wise, the pastries were good, but not worth the price. I've had better for cheaper. My family and I ordered every croissant type they had available at the time: butter, almond, chocolate-almond, apple, & chocolate. They were all okay, but not the best.
My personal favorite was the chocolate croissant.