Nautilus Explorer Liveaboard
I went to Guadalupe on the Nautilus Explorer in September 2015. Overall, it was excellent.
Food: We had all types of food allergies on our trip (gluten, dairy, eggs, etc.) and everyone was well accommodated, and the chef paid very close attention to cross contamination. The food consisted of a continental breakfast, full cooked breakfast, lunch, dinner, and snacks. Everything was delicious and there was plenty available. It was some of the best food I've had on a liveaboard.
Cabins: I like the fact that the double cabins are side by side beds, not bunks. There's plenty of storage space. By comparison to most other liveaboards, the cabin are a decent size. The shower always had hot water and strong water pressure. The toilet was a real toilet (like you'd find in your house), not a marine toilet. The only complaint I have about the cabins (and why I gave it 4 stars instead of 5) is because the mattresses are really hard. However, I was told that you can ask them to put a comforter between the fitted sheet and the mattress, which would help.
Crew: Stellar. Every one of them. The hostesses are always around to bring you a drink, snack, or whatever you need. The crew will bend over backwards to ensure you have an amazing trip.
Diving: Great white sharks - what's not to love?!? Nautilus Explorer runs an on-time and efficient dive schedule for the submersible cages. The guys on deck are always available to help you don weights or get in/out of the surface cages.
Overall, I was very impressed with this boat and I'm already scheduled to go on Nautilus Explorer again next year.