The apartment is extremely clean and well-presented, and in a good location. Overall we were really pleased.
The check-in was ok, although it seemed our host arrived a bit late , and seemed to have double-booked herself as we had to wait a while for her to check someone else in first. There were also a lot of forms to fill out, not sure if this is standard in Austria but I haven't had to do this elsewhere. So I would allow for a bit of extra time when you arrive.
There are a few small quirks of the place which are worth knowing. In particular, despite what the listing says, I would not recommend this place for long term stays. Although it looks lovely and modern, the kitchen is a slightly odd design so the oven is very high up (it's hard to put things in as the door opens to block your view), and the sink is basically impossible to use if you are over 6ft, because it's low and very deep into the corner. Also note that, although the place is ostensibly not just for couples, the bathroom is in the main bedroom with no door. So if you want to shower you'll have to make sure your buddy stays in the kitchen! It's also a sitting-only shower. All that is fine for a short stay but I think I'd start to get quite uncomfortable after more than a week.
The communication was excellent, with many messages before our trip with lists of recommendations. If anything, it was a bit too much, with several messages during our stay as well, reminding us of the rules and procedure while staying there! But too much is better than too little.
Overall none of this was a problem, just useful to know if you're going to stay here. We had a lovely time.