We had 2 days of good dives with Chema, the owner of Nautilus. Two of us had been on many dives prior to this, while two of us were freshly certified. Chema gave special attention to the new divers, helping them with their equipment both on and off the boat. A storm had just been through and the water was still a bit rough, but we were still able to have a good time. The reef is in pretty good shape, but there were not as many fish as other places we have been, possibly because of the recent storm.
The dive shop itself is pretty small and a bit run down, but still very functional. It not in any better or worse repair than anything else on Big Corn Island. We brought our own masks, snorkels, fins, and dive watches. The BCDs and regulators they have to rent are not the latest and greatest, but they are all in working order. It's a short walk from the dive shop to the boat, which is a panga big enough for the dive master, the captain, and about 5 divers and tanks. They hauled all our equipment to and from the boat and rinsed everything for us when we were done.
We had hoped to visit Blowing Rock, but the water was still too rough from the recent storm so we wound up not diving at all the third day and just snorkeling off the north end by Anastacia's which was fairly good.
Bottom line, we're not likely to visit Big Corn Island again just for scuba, but if we do wind up there again we'll probably dive with Nautilus.