I like its ability for people who are travelling or working from home but need access to their email while they're away as well having it stored safely at an offsite location means no more worrying about security when connecting online! It can be quite slow compared to other providers so if you want something quick this may not necessarily suit everyone unless speed isn't super important (which i don’t think would fit anyone!).
You get 2GB free storage space which gives us enough room even though we receive around 1million messages per day across 3 different accounts within our office alone - plus there is also additional backup via cloud service too where possible should things go wrong etc.