Overall would not recommend this apartment. It is not near any of the attractions in the city or the airport buses or airport metro meaning you would have to travel into the centre (which is at least a 30 minute uphill journey on cobblestones by foot - making it very difficult to push a suitcase or transport luggage). In addition, there is no lift in the building, only a steep winding suitcase and the apartment is on the second floor.
As for inside the apartment, there are only two proper beds, the sofa is an uncomfortable wooden contraption with a thin mattress on top - would not be sufficient or comfortable as a sofa bed so only recommend 3 people staying max. The apartment is also not very clean, no soap or sponges provided for the bathroom or kitchen and the floor was dirty so it was necessary to wear shoes or slippers on all floors. the bathroom window did not open making the bathroom constantly wet & clammy. The bedroom with the single bed did not have a window to the outside, only a strange window into the other bedroom which meant if a light was on in either of the bedrooms, it would also light up the other room.
You get what you pay for in terms of quality, in hindsight would have been more comfortable paying slightly more to stay in a more central, cleaner location.