This already has a ton of reviews, so I'll hit the highlights.
The service from the hostess stand, to our bartender, to our waiter was exceptional. I've read through some reviews that the staff can be pretty cold, but we didn't get that at all. We felt so welcomed, which is much appreciated for a girls night out.
The bread is delicious. I had the bacon wrap dates, mozzarella salad, salmon, and asparagus. All of it tasted great. The sauce the salmon came with was so good I was using the bread to clean my plate.
Some complain about the small portions. I run a lot and went for a 2 hour hike/run the same morning we went to dinner. I eat a lot. After having some of the complimentary bread, sharing the bacon wrap dates with the girls (I only had one), the salad and salmon were more than enough. In fact, I should have split the salad with someone. I didn't even ask for dessert! I always ask for dessert! I think the people who complain about the portion sizes at Giada's must eat regularly at Cheesecake Factory or something. Or maybe they're just ordering two small plates from the left side of the menu? I don't know.
The only reason that I can't give it 5 stars are the prices. I know! Vegas! I usually roll my eyes when I see people complain about the prices at a nice restaurant in Las Vegas. It's a given. However, I live here and eat out on the strip a ton. I don't mind dropping some change on good food, but I thought comparatively, Giada's food and wines by the glass was priced a few more dollars than it should have been. The wines were on a much higher markup than some other nicer places I've been.