Pro: We arrived 1h30' sooner than the check in time, so we called our host to ask, if it would be possible to let us store our baggage somewhere and was helpful and kind enough to even suggesting us to check in earlier since the room was ready. The access to the keys was very easy. The room was comfortable, quiet, clean and warm. The view was great too and that is why we selected this appartment in the first place.
Contra: There was nothing I didn't like per see, but there was something that seemed strange to me. Even though the room was booked for two people there was only one set of towels. Since this is an appartment and not a hotel maybe I should have confirmed it beforehand, but in any case we had our own towels so it wasn't much of a problem. Also, in order for us to have some warm water for shower etc we had to let the water run at least for 5' or more, something that was written in the room's instructions, but I think it's a shame to waste all this water while waiting.