The interface is great to use in conjunction with our own software used internally within my organisation (CASE). From an external perspective it can be difficult at first but once you get your head around all of its features then there are no problems using this service from either end! This isn't really something I have had any issues or complaints about however if i was looking into starting another business like bookons 4 days would definitely look elsewhere - maybe more expensive than what we were offered initially? A complete solution that gives us full control over everything regarding reservations/bookings etc as well allowing easy integration between internal systems such has case management / HRIS.