I've been working for British Telecommunications companies in Spain for the last 6 years and I know what this business is all about pretty well. In fact, I used to design hosting services for my companies and I can assure that ICDSoft package is very well designed even as the control panel maybe can be a little improved.
I recommended ICDSoft to my friends because price quality ratio is very high. Most of all, https webmail is the leading service all of my friends demand from me (in this turbulent times of Proxies everywhere).
I'm planning to stay the next 10 years.
I can not comment on technical support because I had no problems till now.