Insurance by Caravan Guard - any good?

we've just brought another caravan from a dealer and it comes with the 10 days free insurance from Caravan Guard. Whilst on the phone to them we deicded to get a quote that came out at £410.

The Insurance quote through CC came out at £550 for slightly less cover.

So at the moment it looks like Caravan Guard are the ones to go for, but before we commit to buy, has anyone had any dealings with them, and if so, good or bad??

thanks