This is for the Planet Hollywood location.
I'm not too sure why the reviews are so bad; I had a great customer service experience at such a last minute time.
I came with friends for EDC weekend; long story short we got stuck in Vegas and needed a car ASAP. We were already staying in Planet Hollywood, so I called downstairs and requested a car. I also told them that I have discount code which she gladly looked up for me. When we went downstairs I didn't realize that we needed a card to put the deposit on; so she kindly kept our car on hold while we went to find an ATM. Being 2 hours had passed, when we came back they still had everything on hold for us and we were out and ready to go within 20 minutes. The car was parked in self parking so we didn't have to get it right away. It was clean and ready to go. Drove it all the way back to San Francisco without any trouble returning it.
Quick, Reliable, and very friendly. Don't hesitate to come here.