My friends and I ate here on a Saturday night at 7:30 and had no issue getting a table. We decided on Sirio because it was in our hotel (Aria) and because we had gotten a reward for playing myVEGAS on Facebook. The service was a little slow which was irritating at first, but then we realized they want you to enjoy your meal and the conversation so dinner flowed at a leisurely pace.
After we ordered our drinks a server brought bread (regular and Parmesan-crusted) to our table along with olive oil and balsamic vinegar.
We ordered a five item antipasto platter (reward from myVEGAS) and were amazed at how big it was! We got three kinds of cheese (I only remember one was Parmesan) and two meats: salami and prosciutto. It also came with garlic bread sticks, giant crackers with cheese baked on top of them, walnut bread, with honey and balsamic vinegar for dipping. I would highly recommend the antipasto. We weren't able to finish it all so we snacked on it when we got home from the club.
I ordered the potato gnocchi with creamy basil pesto and shrimp. My one friend ordered the same thing with chicken instead of shrimp and the other ordered a cheese risotto with peas, asparagus, artichokes, and pancetta. We were all happy with our orders. We definitely could have ordered the smalls since we all brought leftovers up to the room.
It was my friend's birthday so we surprised her with a dessert, which was very, very small. We got petit fours and saying they were bite size is generous. They were free so I won't complain.
The staff was great and helped us pull off the birthday surprise. Definitely worth checking out and if you play myVEGAS, get the antipasto platter!