We believe Microsoft Office 365 is winning the cloud war and will continue to distance themselves from the rest.
Microsoft Office 365 has the same stability of services of other cloud providers, but they have more tools and licensing flexibility and options. You choose what you want to pay for.
Another advantage is that you can tie in all your Microsoft applications and licensing all under one roof. These desktop apps are always up to date and can be installed on your PCs or MACs. This allows you to use apps offline.