Martin’s apartment was great, his communication with us before and during our stay was top notch. Apartment isn’t in the center of everything near all the tourist attractions, but very easy to get to with subway (no transfers, 5 stops away). Outside of the building may look old and a little scary, but inside of the apartment was very nice (as Martin mentioned to us several times before). He also had a pocket WiFi for us to use during our stay, super Convenient!!Great value, would stay with Martin again when we are in Vienna. Thank you for everything Martin!