It is very easy of use once you understand what it does (which wasn't always clear).
Syncing with office365 was difficult at first but now that I have done some research its amazing! The support team were great about helping me resolve issues in real time - even though they where not directly working out my issue we still got there answers from them straight away which shows how responsive their service can be if needed when your using an online product such as this one! We are able get all our staff up & running again after implementing cissync into our O/S so everyone has been happy since then!!