In my view, unless you're part of a group of divers that are larger than 6 people, I'd avoid the larger diver boats. I've used 2 of the smaller 6 diver boat operators. I believe they offer a much more personal experience and better service. The 1st dive boat operator I used was sold out the second day (I had used them on a prior trip), so they referred me to Sandwich Isle Divers. I was glad it happened as I was able to experience another dive operation and had a great experience. Most important to me was that I got to see different dive sites, landscapes and sea life.
As a side note, when you look at their website photos, the boat looks smaller than it really is. The boat is safe and perfect this type of diving. They provided beverages and snacks between/after dives as you'd expect.
They will ask you if you've been to any specific dive sites and ask what you'd like to see. They make changes based on the conditions (ie. visibility, if current is too strong). They'll give you an idea on what to expect at each dive site and type of sea life are usually found. Since I'm on vacation I do like them setting all the gear up and bring it to me at the boat edge. You can do it all yourself if you so desire.
Steve (owner) and his crew were funny and very personable.
Keep your eyes and head moving, you never know what you'll see...whether in the coral or larger fish passing through.
You'll see a variety of sea life
and our dives guides were great at pointing things out.
If you're on a big boat you will have less say on where to go, how long you can stay under water if you are good at breathing, and during the dive everyone may trip over one another when trying to see something that gets pointed out.
Be safe, respect the reef and sea life. You'll have a great time with this outfit!!! I'll be calling them on my next visit to the big island.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.