I like that it's easy to use, there are many extensions available for different purposes which makes life easier when you need some extra functionality in your website/cms system. It can be difficult at times if one does not know how things work or where certain features should appear etc., but with enough practice this will get better over time as well. The interface is very simple so anyone who has basic computer knowledge would find no problem using Typo 3CMS software since they could easily understand what each button means after just looking through their documentation once (which isn't too big).