Firstly, overall, let me say that everything was absolutely ah-MAZing about the island, the hotel and the service! The coffee was good and strong, the room was breezy and close to the beach, there was convenient, affordable bike rental on site, there was hot water and the grounds were breathtaking. You will possibly not find a more gorgeous beach on the planet!
If I HAD to be critical, I would say that the bed was pretty uncomfortable. We did ask for two extra pillows after the first night, which helped some, but the mattress itself was uncomfortable---you could feel the springs digging into you as you slept. I have always slept on futons, love a hard mattress and don't get me wrong, we did sleep, but it was like when you go camping: you are so exhausted from the days activities that you fall into bed, but the ground is, ultimately, hard and you kind of toss and turn all night. We joked that simple foam mattress cover would go a LONG LONG way for Casa Blat Ha.