The pool here is great, one of the best in madrid. The problem is its difficult to get in. You can’t pay at the gate you have to scan a QR code and upload pictures and student ID cards. The QR code didn’t work for me but did for my friend so we managed to get in as he was allowed a guest. Also you can’t bring your own food in but there is a cafe with good coffee. Beware if you are veggie though as there was no option for vegetarians, so you will have to leave and start the process all over again.