They were a lot cheaper for me to, new rider - first bike.
I had to call them up to change the registration for my bike as the dealer gave me the wrong one, got through no problem and instead of charging me an admin fee (£13 or something) they offered to reduce my excess (it was rather high) for £23 while changing the registration. Was a bit random, but thought why not - first year riding there's a good chance of a claim!
As the others said, you get your documents emailed within 24 hours, and then the paper ones came a few days later.
Worth it for the savings.