I thought I would post some links from my recent research - both good and bad. THe Nology site Q&A sounds a bit too good to be true
http://www.nology.com/hotquest.html#Q2 but it covers the basics.
On the other hand, here is a link to an unsatisfied customer.
http://iwcweb.com/eclipse/html/warning.html Although his experience is with his car it may be relevant.
Anyway, I'd like to hear of more personal experiences.