I came to Pizza Rock on a Sunday with 2 friends for brunch. Unfortunately, our experience there was disappointing.
The restaurant is located in downtown Las Vegas and you should be ready to expect some traffic on your way there on the freeway. There are a few parking structures around the restaurant but you will need to pay for them (Update: I have been told that Pizza Rock offers free validated parking at the parking garage across the street at 3rd and Ogden. Ask about it people!).
Service was disappointing and extremely slow and the food was rather good but expensive and you would expect better quality for the price you pay. We all had the bottomless mimosas for $15 and I had the Mob Boss pizza for $32.
The main problem was that the food took over 45 minutes to get to our table and my pizza was cold by the time my friends got their food. The free appetizer we received unfortunately did not warm up my pizza even though it was a nice gesture. Finally, our waiter was also very slow to refill our mimosas since we had to wait over 20 minutes on several occasions with an empty glass despite several requests, telling us that "he had other tables as well...". A little rude maybe?
In the end, I would not recommend this place mainly because of service issues. Feel free to message me for any additional details that you may need!