Easy connection with online platforms like Expedia or Booking direct etc., easy integration in CRM systems (Salesforce), great customer support team - always helpful when you need it! The price tag was too high compared with other competitors but I think they are adjusting now since there have been some improvements after our feedbacks were taken into account so maybe we can expect good news soon :) We needed something which integrates easily with booking engines such as Bookingdirect /Expedia/HotelsOnline etc.
Also being able to integrate directly within SalesForce would be nice.