I just got back from Hotel Coz 2 weeks ago. I found the rooms to be quite acceptable. I wouldn't normally do the AI, since I don't drink - booze or much soda - but this trip included breakfast. I dont know what the breakfast cost since it was comped due to some previous problem the LDS had there. I dont know any of those details. That was nice, except that the cook does not come on duty until 7:00, even though the buffet opens around 6:30 (remember youre in Mexico). So, the eggs-cooked-to-order line was about 25 persons long by the time the cook started cooking. But they were cooked correctly. I always waited, and had a good breakfast before walking under the street to the lookers to get ready to board our boat. I was quite satisfied with the package the LDS arranged for 3 dives a day. I would not plan on eating your lunch there unless you had to (non-AI plan). An order of French fries from the buffet line (old and hard, not fresh) was $3, and the salad, which appeared to be more garnished for the burgers, was $5. Kind of high priced compared to what you could get elsewhere. I never ate dinner there.
We were supposed to have 2 morning and one afternoon, but the boat crew queried us and we decided to do all three consecutively. We had to go back to the harbor to get fresh tanks for the third dive, but we were usually finished by 2:00 2:30 and that let those who wanted to lay by the pool, or shop, or have some drinks ample time to do so before dinner. I tried to schedule another afternoon dive, but found the operator to be less than flexible unless previously scheduled at least the day before, and then you had to have a minimum of 4 or 6 divers. I thought I could just jump on a boat with other divers going out, but that wasnt the way they ran it. The DMs and the Captain we had were wonderful, even if the office folks were not very flexible.
In any case, it was nice to be able to wash our dive stuff, and put it in a locker right at the pier. Most of us did take cameras, wetsuits and wore our booties back to the room which had a nice place to let them dry off on the balcony.
I think it would be a bit of a rush to go to town and get a full breakfast, and return and be ready to board your boat before 8:00. I was a bit rushed when eating right at the hotel, but I like to brush my teeth after eating versus running under the street to the boat directly from breakfast. Im also not sure how early other places open such that you could eat at 6:00 or 6:30 and return to the hotel in time.
I bought bottled water from Chedraui (think Mexican Super Wal-Mart) for $0.27/bottle and $1.72/5 liters. I made my own ice tea in water bottles I brought with me, and put them in a collapsible cooler I also brought with me, covered with ice from the ice machines at the hotel. I didnt know if the ice was safe to drink so I used it only for cooling. I also picked up something for light lunches, and we ate dinner out which was a social event with the LDS group as much as for simple nourishment.
There are no refrigerators or microwaves in the rooms (that we had anyway) so making your own breakfast/lunch is a bit more challenging. I did like the arrangement and location of the dive op very much. This was my first time staying on Coz, so I cannot compare to other hotels. But I would stay there again.