Hi. I've no personal experience with them but feedback from my customers and on the thread below tells me that you should tread very carefully and consider all outcomes when using online car suppliers.
http://www.moneysupermarket.com/community/forums/t/quotnewcardiscountcomquot-are-they-reliable-8092.aspx
Best of luck.
JJ
You gotta tie yourself to the mast my friend, and the storm will end.