IT WAS THE WORST CHECK-IN EXPERIENCE WE EVER HAD, so please read my review carefully before choosing Harry's place. Because of our flight, our check-in time was late - we informed Harry about it and he said no problem regarding the late check-in. He sent a short list of instructions on how to get to the apartment. I also asked him about the best way to reach the apartment at night, but he didn't answer to this question - so don't expect Harry to be helpful.
But the worst part was just coming. Our flight was delayed two times, so we reached the apartment at 3 AM. We found the building easily, ready for our night sleep. The first step of Harry's instructions for check-in was: "Enter the building - the doors are open". Well, no. It was locked, and it was 3 AM. We spent many hours trying to open the door (somehow), looking for other doors, walking around the building to make sure we are really in the right place, etc. But no, it was still locked, and we understood that we won't be able to enter the apartment today.
So it was a crazy experience - with all our luggage we had to spend 4 hours outside when it was raining because Harry's instructions were not clear enough. We were sitting on the stairs next to the building for a long time, our first night at Vienna was completely ruined. At 7 AM, Harry finally woke up and texted us "Oh, sorry, I didn't think the door will be locked. There is an emergency key in a box next to the door". He sent us 4 number code and we were able to pick that emergency key to finally enter the building and go to our apartment.
That's the fun part - that key was always in front of us and all this terrible night could be avoided IF HARRY GAVE US A CODE TO EMERGENCY KEY IN ADVANCE while he was sending us the instructions the day before. But he didn't - I don't know the reason why - and it was the main problem.
Because of that, I can't recommend Harry as a host. He was not responsible, he is not helpful, his communication is poor, and on top of that, the instructions were not clear enough. If you are used to friendly hosts as they usually are on Airbnb - don't expect it from Harry. However, I have to be honest - his Airbnb is in an amazing location, you can reach all main attractions in the city on foot. Everything that we needed was there in the apartment.
So my final thoughts: the place is definitely a good deal for this money in Vienna, but please, please, please, make sure you get all the information from Harry before check-in to avoid our terrible experience. Please ask him for an emergency code for the main door. I was reading some comments on his profile and noticed that we are not the only ones who had this problem with locked door. So, to avoid this situation, make sure you have that emergency code just in case.