It's very easy to use for our small tour operator business with only 7 employees and 2 offices - one office at home and another where we are located overseas! We can manage all aspects of travel from booking flights/hotels etc., through bookings, payments & invoicing.
There isn't anything that i dislike about it so far however it does take time getting familiarized with everything but once you do have full understanding then things run smoothly. If there were more support staff within TSS who could assist me when needed during my working hours than it would be great!! Managing multiple sites around Australia including hotels, car hire companies ect..