They use, or possibly operate, the boat Wightdiver. We used the boat a couple of years ago for a trip out to the U90. Seemed like very nice guys but they happily took our money for a trip to a wreck they didn't have the marks for! Apparently the actual location is a fair distance from the published marks and so, despite surveying the area once we arrived, they were never going to find it. They suggested we try the UB81 but dropped us in with a fair current running and only about half the divers made it on to the wreck. no one was particularly impressed. There is, I believe, a trip report on here. The trip was organised by Lou.
That said, there may well be people with nice things to say about them
Cheers/Nic