I've rented from there twice. It's your typical hotel-based car rental desk. By that I mean it's usually one person doing everything. Unlike airport locations, the representative will sometimes walk you out to the car and do a damage check of the vehicle with you. That extra step can take some time, but I consider it to be a good thing.
Absent an unusual problem, it shouldn't take long to complete the transaction. The only caveat would be if someone else is picking up/dropping off a car and got there just before you did.