Had a really good time on Phangan arena. The parties there were really fun and the areas to hang out on were great: pool, TV, pool tables, football field etc. Also enjoyed the 24h restaurant.
However, my room was really small and cramped with four people, which seemed excessive since other, bigger rooms were half full. It also smelled terribly of maybe mold and general dampness, leant by the fact that there were no windows or ventilation. This seems to be a hit or miss situation though, since some rooms were really great. Overall, I would stay here again, maybe just ask for a better room.