The place is tightly controlled so I would not be worried at all about a lack of appointments. They have long operating hours. Both times I visited they had 3 girls available. Doing the math, that is quite a few appointments. The place is a bit addicting because of the providers ages. Honestly, from the 2 appointments, I do not think you can go wrong with anyone here. Unlike the other places where many are not so desirable. And the ones that are desirable create overbooking, crowds, gaming with multiple customers, and being short changed on time. Plus the provider and place begin to become a hot mess.
With the quality women and high control over consistency of service provided, you will have a great experience regardless who you see. The quality will allow them to book all 3 at the same time versus all mongering to the same woman back to back.