The tourist apartment we booked is rather a tight fit, and while it can probably comfortably fit four people, five was way too much. We had to make use of the couch bed, which took up all of the tiny living area and made moving around the apartment near impossible. Also, the mattress on it wasn't great, so not exactly a comfortable night's sleep. The built-in bunk beds in the bedroom and overall aesthetic of the interior were very charming, though. :-)
Also, parking was not enforced, and someone else ended up taking our dedicated spot, and we had to double-park overnight as a result, but all's well that ends well.