The staff were great. Awesome location close to everything in Castellón. Very convenient underground parking at the hotel for 10 euros a night. Fridge in the room and complementary tiny bottles of water! Loved the tourism book in English and Spanish, even though the information about the airport was outdated :)
Unfortunately, the bed and pillows sucked; we woke up each morning with achy backs and necks. The real (American-style) shower worked great, but instantly humidified the room anytime it was used. The air conditioning in the room barely made a difference. WiFi was not the absolute worst I've ever used, but constantly dropped ping requests (took 2-3 page loads or retries of any action before it worked)... and toward the end, it seemed like we were some of the only guests in the hotel, so that's really saying something. Perhaps they should have made the password something other than "internet" :/