The ability to have all customer information within one system is amazing! It's also easy for anyone who has never used it before to use right away without any training needed.
My only complaint so far has been that when you are looking at an event or page of your account there can be times where some things like dates don't load properly but other than this I haven't found anything wrong yet!! Customer service was very helpful as well - they were happy we decided to go through them because their product works great and makes our life easier by having everything under one roof (even though we pay extra).