Our guide book said that for Icelanders going to the swimming pool is like Brits going to the pub. We went here on a Saturday, late afternoon and it did have a very sociable feel and we felt like we were really in Iceland rather than just a tourist attraction. The temperature of the water is amazing and although I thought the last thing I would feel like doing is sauntering around in my swimming cossie outside in Iceland in January, it was just absolutely heavenly being so cold and then dipping into the warm water. We particularly enjoyed the seawater pool. The changing rooms were immaculately clean and everyone just walks round naked which made me feel better as I was worried about the showering with no costume beforehand. You get a wristband when you pay which operates the lockers so you don't have to faf around with change. Such a bargain, it has to be done and the hotdogs outside are a great reward for doing a few laps in the pool.