Nice place and centrally located...
It has a full kitchen (with pots and pans, etc) and there's excellent supermarkets nearby, so if you'd like to make your own meals, this is the place.
There's two full bedrooms, one with more privacy (clear windows) than the other.
While the layout looks a little odd from the blueprint, it's actually a great layout and very comfortable. The furnishing are stylish and new-ish. Beds are very comfortable. Great beach access, and everything is walkable... from the palace to the castle. Check out the funicular if you get a chance (and skip the mini train tour).
A few pointers that'll help you avoid making a few of the same mistakes we did:
It can take a while to get to park and get to the unit (parking is a hassle in SS, see below) -- make sure when you set the meet up time for the key you take this into account. We were almost an hour later than we thought we'd be by the time we parked and got the car back. There's very little on street parking, so don't count on being able to park in front of the unit.
If it's a hot week, it's not air conditioned-so beware.
Parking is a ways away, and about 27E a night. Not crazy for the area, but you can find free parking in the park and rides around the edge of the city and take transport in if you'd like to avoid the cost.
Trash pickup is LOUD and happens from about midnight to 2:30 AM on Weds mornings... be prepared (shut the windows!)