To be honest, the apartment is not suitable for 4 people. The sleep couch is very uncomfortable and is definitely not suitable for people with back problems. The bathroom is very small, even for only 2 people. Four locks is overkill while the backdoor has a very simple lock. The airconditioning in the bedroom is very loud. The WiFi is extremely slow and sometimes not functioning.
However, the facilities were great: a lot of beach materials, fully equipped kitchen, nice interior and nice residence with a shared pool available. Recommended for couples.