I went to Vegas for two nights two weeks apart. Both times, I came to Carbone. The second time, I ate alone at the bar, which was a very experience (and pretty much your only option if you are going on the fly, even on a random weeknight at 9pm).
The standards are spectacular: the rigatoni, the caesar (made tableside), the meatballs. Cocktails & wine selection are both also fantastic.
It's a fun environment that feels actually authentic - very refreshing vs. the rest of the Vegas vibe. I like how old school and traditional it is. Looking forward to coming back!