The ease of use, the ability to add new features as they are needed, the ability to do things that other companies charge for. I think the most difficult part is that it is not as easy to add new features as I would like it to be. I would like more advanced features and more flexibility. I am able to see all of the reservations that are entered into the system. I am able to see what reservations are coming up and when they are coming up. I am able to see how many people are staying in each site and how many are coming up each month.