I've been with FJ for 4 years now (Im 23) and they were the best option - £650 fully comp at 19 - now I only pay £330 fully comp.
The list of criteria above is only for internet quotes, there is a line underneath (or used to be) saying if you do not tick al the boxes give them a call.
With regards to them limiting your mileage, that is your choice, startng at a minmum of 1500 miles and going up in 1500 mile brackets up to 12000 miles but they do offer unlimited mileage also. I'd stay clear of only 1500 miles/year though as this costs more than 3000 miles in some casesas they see you not to be gainig much experince on the road.
Hope that helps.
Edit - spelling
Thanks for the clarification.