The apartment looks really great, nice location, and we appreciated the good communication channel. The host were always replying very fast, and the information was very clear. We were also liking that the checkin was automatic.
For future travelers, I would only warn you that if you need to cancel the trip, even for some big reason like a Vienna COVID lockdown, he might want to stick to the cancelation policy (in our case, 50% of the price). However, airbnb was nice to give us a full refund, so a high point to aibnb and a great PLUS to use this service.
Summarizing, apparently all good, but just be mindful of the cancellation policy and in case of big issues you can trust the final airbnb judgement.