I had a friend who had a problem with an EV1 leased server; apparently it would not work properly with their Curl - based scripts -- some packages needed to be upgraded to work properly with Curl. EV1 support would not do the upgrade and insisted the customer do the upgrade. The upgrade was simple on the surface, but not in practice, and after several days of failed upgrade attempts my friend insisted on a refund, which then proved difficult to obtain.
All this is just to say be sure that the versions of the different libraries on the server you intend to use there are sufficient for your application. Don't assume they have the latest version of the packages your require, or that they will help you if you need something upgraded. It's probably not in their contract.
However, if your application works with what they have, all should be fine and I hear their more standard support responses are great.