Unfortunately, the stay at this beautiful place well located was ruined by the fact that the host didn't take seriously our complaints regarding temperature or access to the place.
The thermostats or something was not well programmed in the heating, and we were freezing at night with two little kids (6 months and 3). They were ignoring our questions numerous times (but were very proactive and organized for the checkout time). we asked for a little extra heater (i could even get one myself), they just said no....
I hope by the next guess they'll have arranged the thermostat, the weather will warm up or get an extra heater.
Also, for any group not leaving or arriving at the same time at the appartment, I'd highly recommend finding a new place. They tried, but there is no way to get an extra key. Luckily the emergency stairs happen to be unlocked at that level so you can climb 350 stairs or so to get to the appartment (and the other person can leave the door unlocked while they sleep so you can access it). Even if the building doesn't let them get extra cards, they could at least provide spare keys for guess that would need it.
Getting a bit picky here, but the spa was not really a spa (the same temperature as a slightly heated pool),but i did see it as a great feature when we reserved (maybe other potential guests also) , so a bit desappointing.