Cloud / Desktop As a Service

Has anyone moved their desktops out to a cloud based environment, and if so with who?  We just started talking to "Infinitely Virtual" which seems like an interesting approach.  Unlike Azure, where we have to hire an IT firm to build the whole thing out, this platform seems like it's ready made with all the bells and whistles.  I know there are other firms out there like them, and curious to know what others have used.