We always dreamed that the client could be able to get all optional extras in a few clicks. That was not possible until MMK introduced the XML service, which enabled us to get all info about current discounts and availability.
We are using Booking Manager now for five years and it has made our work much easier. The program is good in general for running the business and having it all at one place, reachable from wherever you might be at the moment.
Booking Manager is one of our favorite partners, as the API data structure and performance is very good. We especially value the personal contact to the developers and their open-mindedness for constant improvement.