My girlfriend and I stayed at Martin's for 4 days and it was overall pleasant. The location is walking distance to the city centre and the subway, the check-in was easy, and there are machines for coffee and cold soft drinks in the building which come in pretty handy on hot days since all supermarkets close at 20:00 (typical for Vienna). Also, there is no air conditioning (typical for Vienna) and you have to sleep with open windows, which is fine, but we found the street to be very noisy during the night and we wouldn't recommend it for light sleepers. The apartment was clean, but it feels like a dorm and we found the photos to be misleading. There is no washing machine even though it is stated in the listing. There were also some minor nonessential features missing or broken, such as the toilet paper holder, some door knobs, there was a dent on the coffee table and the dishwasher was not emptied when we arrived. None of this really prevents you from having a nice stay, but it does take a lot out of the cosiness of the place. With that said the price/value is good and if you are not looking for something luxurious - it is the place for you.