I'm considering ordering a server from rackshack.

Do you have any comments on ENSIM and PLESK? I previously used COBALT stuff, and it was a mess to use. In the end, I changed my servers to plan redhat.

But I'm still interested in one of these tools, they could save time.

One major question I have is, if upgrade/modify some software components (such as changing mail server), will the tools still work?