Deep Sea Divers Den upgraded their vessel as you can see from their Web Site in about June last year. they now have an excellent range of day boats in Reef Quest and Sea Quest. Reef Quest transfers you to the Liveaboard which remains out at Hastings, Saxon and Norman Reef.
Yes, they have great service, gear is good and the staff will do an excellent job in guiding you around for your dives.
Paul, your profile says that you have a good number of dives under your belt, Some things to consider for your trip here.
1. It's always a good option to consider when doing an extended trip to look at doing a course of some sort e.g Nitrox, photography etc and which company offers what.
2. How deep you would like to dive... traditionally the boats that have Half cert / half learn to dive on board are abit more stringent in the depths you can dive 2.
Finally.. the most important to oversea's visitors. Reef Quality. I agree with the posts, ALL operators have good boats now, good quality service, food and gear and their pricing reflects the trip as they have all been around for age's.
But depending on where you have dived, and what u want to compair your GBR experience to is the difference.
Hope this helps.
regards Andy.