The last centre cockpit we hired was Broads Sunrise from Richardsons. It was a lovely boat when the weather was nice, which luckily for us was most of the time. The problem was when it started raining you had to put the roof up. I admit it was several years ago and things have probably improved but the wiper was next to useless and to see out of the bit that it did wipe you had to have your head against the roof at an angle, not very comfortable.
I hope the newer boats have better wipers, window demisters and headroom when the roof is up.