Its has been a while since I booked a girl from this agency. They have great prices but most girls are either new and tend not to be GFE. But YMMV
If its your 1st time booking from them, like most agencies they require some form of reference for verification before you can use their services. It could be either from an ID check like P411 or Date Check. The other can be from a well established agency or independent that can vouch for you. When that is all done set up a time and date and there you go.
An important note is that rates change depending on how far you are if you living real close to their base. you can get away with low rates for a date. I set up a date with Angel. Since I am an old client you get some perks such as unblurred pics being sent to you. I got some for Angel and since her rate was low and I was in the mood I took the jump. I would say YMMV. She is ok