For those of you who use ProSeries, hosted on the cloud. . . 

1.  Is the cloud hosting instead of a server or in addition to one?

2.  Do you back up your client files on another drive?

3.  What are the negatives with cloud based vs on your own server.  

Thank you!  I am trying to convince the others to move to the cloud on our renewal, but I also want to make sure there isn't anything I am missing.  

--Amy