I've used them twice now for bookings without any problems; they had availability at some small hotels in St. Petersburg, Russia and San Andres, Colombia, places that weren't showing availability on other booking engines. You get the 5% 'rebate' that you can apply towards later bookings. They also have a price match guarantee that I used on one hotel .

My bookings showed up as : OTEL.COM NEW YORK

The booking interface looks similar to gtahotels.com, indeed the phone # is registered to GTA Hotels (Gulliver's Travel) in New York