Im Robert! I did a 3 days safari cruise in king snefro 5. We dove in Ras Mohamed national park, also in the Thistlegorm...we completed a total orof 11 dives and it was great. Our instructor Ahmed it was attentive all the time making sure everything was perfect. Boat briefings and dive sites briefings really well explained. The crew the captain, the cook and the food it was excellent. We even managed to to snorkeling one day with dolphins.
On the other hand, the dives were about 45 minutes which is not bad, but sometimes icould be a bit longe, for many of us is just one time visiting the red sea and I finished most of the dives with 80 or 90 bars. The day we were on the thistlegorm some people was using nitrox and some other ones normal air, i dont see the point for this. Only one guide for 8 people, not enough specially when the group has differents people and differents certifications.