Had a policy with them for 1 year. One month before the expiration date received a renewal proposal with the quote being £100+ higher than in the previous year. The letter stated that the policy would be renewed automatically and my credit card would be charged (i.e. you don't have to lift a finger, we will gladly charge you a hundred quids more).
Checked against their web site and received the same figure as one year ago. Sent a letter asking not to renew the policy and requesting confirmation - no response for 10 days. Had to call them and cancel over the phone. The person I spoke to confirmed they did receive my letter [and did not bother to action] and offered to "review" the quote, which I refused, the reason being: either you value your customers or not. If you do, make sure the price is competitive: in fact, the premium should be lower each year if no claims have been made.

+es: easy to buy, renewal proposal sent well in advance. Fortunately, have not made any claims so can't rate anything else.

-es: rip-off after the 1st year, no online policy management, cannot be contacted by email/web site forms, do not respond to letters, the only way to contact is using 0845 phone.