The ease of use of the software. The customer support is also very efficient. We love the fact that we can easily add new features whenever we like. The software is quite expensive and we do not really like the fact that there is a yearly subscription fee. However, the annual maintenance is quite inexpensive. If you are looking for a tool that will help you manage your travel and hotel bookings, this is the right software for you. It is easy to use and has a lot of useful features. We have been able to easily manage our travel bookings as well as our hotel bookings.