I recently rented a Sony camera from ATS Rentals. The way it works is that you order online and ATS ships the equipment to a location you choose. This was imperative for me because I was not able to transport equipment to Tampa in a cost-effective way, so I had the camera shipped to my uncle in Orlando, who kindly drove up to assist me with the film.
The process was extremely easy and sending the package back was a breeze. UPS actually lost track of the return shipment for a period of time, but ATS contacted me and once I gave them the information from my UPS drop receipt they told me not to worry about it and that it was between them and UPS. A few days later I got a message that it had all been resolved.
I left some of my own equipment in the box and ATS even shipped it back to me! It was a great experience and I'd recommend them, just as they were recommended to me by award-winning Athens, GA filmmaker Chris Ethridge.
If I had to complain about something, I'd like it if you could search their site by feature set so that I could browse all the cameras with similar features (1080p capabilities plus external microphone, for example) without having to look through other cameras that don't fit my needs.