We wandered around with friends looking for a late night dinner place after doing a bit of a cocktail pub crawl (a cosmo at the cosmo hotel was the highlight). After such an event, a greasy delicious burger at Guy Fieri's seemed like a good fit. I guess it barely lived up to what we expected.
I'll start by saying there are better burgers in Vegas. Those better burgers are also in the same price range or less expensive. You are paying for the name here. It felt slightly trashy when we walked in, but fit what I expected. We got the famous mac and cheese bacon burger with trash can pork nachos and tried some of a friend's mai tai like drink. The pork in the nachos were very fatty and cut into large chunks. It did have good flavor with the cheese sauce and BBQ sauce. The chips stayed crisp despite being smothered. It was pretty good. The burger was actually relatively good too. The pickles were cut thin and the burger was cooked very well (without the waitress asking how we wanted it). He bacon was soggy though and that's not good. It was good but not great or anything to write home about. The drink was subpar, but after an amazing cocktail crawl I didn't expect it to be great.
I'd say overall, 3 stars. Don't avoid it if the above sounds good to you, but if you are looking for a good burger, I'd recommend other places over this. Burger brasserie in particular surpassed expectations. Don't avoid but don't go out of your way for it