I like how well it integrates into our ERP system (Sabre) as we use both at work! The user interface can be improved upon but this seems difficult since its so new - maybe they are still tweaking things? We have not had any issues yet.
It has been easy enought o learn from one of their excellent training courses offered online or in person by Certified Trainers who come out regularly throughout North America. Try them if nothing else then just try getting answers about what's coming next when using other systems/tools where there may only ever be 1 answer given without much explanation behind why something does certain ways etc..