Where do I even start. Our stay at Karl and Lisa's home might have been one of the best in all of my travels through Airbnb or otherwise. Everything from booking to check-in and check-out was just absolutely perfect and handled with professionalism. 1.Booking/check-in/check out Ever since I booked the apartment, the communication with Karl and Lisa was of the highest level. We messaged back and forth to coordinate arrival times, entering the apartment, staying there and finally checking out. The check in was the really interesting part. Days before arrival, Karl told me to install an app on my phone, which I would then use to unlock the door of the apartment and check in. At the day of arrival, we received our personal invitation code, and with two presses of a button the lock clicked and the door opened. That was some 007 stuff and was actually quite awesome to experience. After we checked in, Karl messaged me a few times to see if everything was fine and just to check how things were going. Overall, talking to him was a pleasure - everything was done with great care and attention to detail. We only regret not being able to meet them, but that could change the next time. Checking out was also effortless - you leave the keys inside, lock the door with the app and that's it. 2. Apartment The moment you enter the apartment, you know you're staying with hosts that really care about your trip. Everything in the apartment was brand new, the kitchen was fully functional and very clean, with coffee, a small stove, kitchenware and everything else needed. The bathroom had enough room and was also very clean, there was literally nothing else to ask for, it was all there. The bedroom/living room had a very comfortable double bed, with snow-white fresh sheets. If you're feeling paranoid, there was also a metal locker with a key, so you could put valuables inside and not think about that when you're out in Vienna, but we never used it. Other cool additions to the apartment were a small digital dial on the wall, which controls the temperature of the apartment, easy to control and manage, and last, but definitely not least, Netflix, which we really didn't use much, but not for lack of wanting. After 17 kilometers of walking every day we just went home and passed out in seconds. Yes, home, because that is exactly how you feel when you're there. The apartment had nice little touches on the walls, mostly posters, that made it feel more personalized and not like you're staying in a hotel room. It's a real, living space, not just a room with a bed and windows. Overall, the stay at Karl and Lisa's apartment was 10/10. Everything from communication to check-in and checking out, to all the amenities of the apartment, were just perfect. If you stay here, and you absolutely should, make sure you meet Karl and...