I love how easy it is to use! The customer support team are amazing too - they work so hard for you when things go wrong but also give clear guidance as needed about what's going well or not with your site/event etc., which makes them all worth using every time!! Nothing really other than that there isn't anything specific i dislike- everything has been great thus far :) We have used this system since we started our business (and before) in 2016; however just recently upgraded from 1 year old version of registrar platform into latest 2 years ago one after another upgrade was done by their service provider who had no idea where do register / upload files at times nor did he know much abt SEO aspects either ;).