We really enjoyed our stay in Malaga, the roof terrace is definitely a bonus and we loved sitting there in the late afternoons before going out in the evening. it has a great view! It is a studio apartment at the top (it is in the eaves so has limited headroom over the beds). It was clean and tidy and Andrea was very responsive to us when we were confused about how to check in - it was actually really easy!
The only limitation is the ladder leading to the roof terrace is right in the middle of the bathroom- it's not really a problem, however it could be difficult to move around if you are on the larger side.. I probably wouldn't recommend this apartment if you have mobility issues as you need to walk up the last set of stairs to the apartment and you wouldn't be able to access the roof terrace.
The location is great- right next to all of the restaurants (however it is a bit touristy) it is however about a 25 minute walk to the beach. If you go to the beach- beach towels aren't provided so bring your own.
Overall we definitely recommend staying here if you are visiting Malaga for a couple of days.