Just returned from a 7 day trip staying in West End. I highly recommend Reef Gliders, although you'll mostly dive shallow on the reef right outside of west end, that is unless you have enough divers interested in the seamounts or somewhere further away. Anyways, saw a few moray eels, green turtles, reef squid, queen angel fish, parrot fish, grouper, eagle rays. Lots of barrel sponges.
Reef Gliders has integrated weights, great boats on a private dock with a restaurant to enjoy during your SI. Everyone was extremely professional.
That being said, while the diving is cheap and clear, make sure to use ear drops. I'm in the process of treating a raging ear infection from the contaminated water. As a black water diver, I was really surprised by the trash on the island and how dirty everything was in West End.
Great snorkeling on the left side of Half Moon Bay (Out from Gingers by the rocks)
Places not to visit- Ipanema, Argentinian Grill, ISoar, Coxen Hole.
Bananarama in west bay was cool, crowded. The pupusa place in west end was the standout. TBH could have stayed at the Blue Marlin (reef gliders) all week and wouldn't have missed any food/drink/entertainment experiences.
Allow yourself at least 2 hours at the airport for your return. Chaotic customs/security. If staying in West End, allow yourself 40min+ to get to the airport, as we were leaving there was major construction happening on the 1 way road.