Just tried this site for a car quote and another well known one, and very disappointed that no quotes available for any driver 25 yrs and older. My present cover allows this and I cannot see any good reason why sites such as this cannot do likewise. If you go to a broker or tied agent they can offer it no bother.
Another worry about the quote system was did the quotes allow the driving of other cars extension for the policyholder( for third party risks), again I have this and this is very important to me.
My advice to anyone is use a broker or a tied agent, get good advice on the type and level of cover you require and you will be surprised how much better the quotes can be.