I stayed for four nights, overall I woukd not stay again.
Pros:
Location
View of the stars at night
Cons:
Noise travels very easily. Now theoreticaly there are quiet hours from 9pm to 8am. The reality is someone talking in a regular voice in the room across will sound like they are right next to you. Unless they take a vow of silence, they'll be waking you up early (7am in my case). With rooms as close together as they are expecting people to be quiet doesn't really scale.
The bed in my private room was uncomfortable. I suspect the mattress is 10+ years old and badly needs to be tossed. This was the biggest con in my case, as after a few nights it became a real drag.
I'm now at a much nicer place in another part of the island for only slightly more money. Overall this place feels like false economy with the variety of options out there.