First of all, it is important to know that the South Ari Dive Center is a Dive Center - and NOT a hotel. So you are accommodated at at one of a few other hotels on the island. You do NOT stay at the South Ari Center. I was accommodated at the Banyan Villa, which was quite a nice, but simple hotel. But they also use other hotels.
So I'm actually reviewing the Banyan Villa here:
The hotel is small and familiar, the host is very welcoming and staff is really caring and helpful. I booked "full board & all inclusive" and was a bit astonished that this only included water, tea and (instant) coffee. So I complained and after a short discussion I got all sodas for free. That was OK for me, but I believe it's important to know. The food was a bit repetitive and not too exciting, but OK. Again, service was good.
Rooms are spacious, beds are all good and A/C is working well. (I had to change rooms once in between, so I know more than one room ;-))
The room was only cleaned twice over my one-week stay.