It is intuitive to use for both existing users as well new ones who are looking into this product from outside of their client base or industry verticals they provide services in daily operations/ workflow etc..
There have been no complaints that I am aware off at all regarding it's functionality over time (2 years). We needed an ERP solution which had patient demographics / data collection features built right along side our scheduler so we could easily generate billing & provider information using same interface - without having 2 separate systems!