I have been looking around for an appropriate hosting solution to use. I want to set up a server to allow clients to host domains. There are several examples of opensource and commercial software that offer such a facility. I tried a couple and decided that above all, stability was paramount. A close second came security and thirdly and very importantly, ease of use and customer satisfaction.
It boiled down to two solutions, cPanel (which I have used before) and Plesk. And... I decided on the latter. I'm afraid to say that I don't really have any evidence related to which is better - I think I just preferred the examples and demonstration implementations of Plesk.