Came here for a special occasion and thoroughly enjoyed the experience and the excellent food. The atmosphere and decor is very classy and the large circular booths are very nice for a group of 4 people. The steak here is amazing, and while it is quite pricey, it is nothing like as expensive as places on the strip of same (or lesser) quality. The only disappointment was our server who can only be described as clueless. He didn't know the answers to fairly basic questions, and annoyingly forgot quite a few requests we made. If it wasn't for that, I'd have given Andiamo's 5 stars.
And for gluten free, as it's a steakhouse this isn't a problem.