I agree with most of the other reviewers here...customer service is kind of hit and miss.
On the positive side, we rented through Priceline and ended up with Hertz. Price ended up being good at the time we booked and great at the time we left. Car was a mid-size, was fine, and we enjoyed having Sirius radio in the car...a station devoted to Elvis riding around in Vegas...very nice. :)
On the negative side...yes, the agent can be a bit pushy about things such as the gas purchase but overall was efficient. On the return, I was misdirected to a luggage cart area as the agent was more concerned with getting her paper work done than customer service to someone who was no longer a customer. Not a huge deal.
Overall this rental was fine but last year we used Thrifty and I do think they had better customer service skills.