Stayed for an extended stay here in Vienna. Came from a lovely modern AirBNB prior to Martin's, but wanted to save some money and gave his place a try. Pros and Cons below.
PROs:
-great communication with Martin, very responsive
-cute touch of candy and apples on arrival
-short 10 min (albeit uphill) walk to Johnstrase on the orange line and 3 min to trams/busses
-Close to Schonbrunn palace but nothing else touristy
CONs:
-Easy to hear the neighbors arguing above you as mentioned in other reviews
-A bit farther from downtown (approx 10 min train ride + 10 min walk to train station) to Stephansplatz for example
-The sink base was being held up by a piece of wooden board.
-The shower got hot very quickly, the knobs are very finicky and you cannot change the temperature. Be careful. Not a huge deal if you like scalding hot water. Also, the water would pile up quickly and cause mini floods into the hallway.
-The attempt to make nice touches was made via plants, but this caused lots of gnats/little bugs in the apartment. I found myself swatting a lot.
-The bed made creaky noises.
-I get that the attempt was made to make this place home-y and easy for travelers thus a lot of tea, coffee, and eggs, milk, liquor, sauces etc were left in the refrigerator, but to me that was a bit disgusting to see leftover food from prior guests not thrown out to be honest.
-It is very dark in the building and can appear scary at night especially when alone. Find the light on your first day so that you won't be as frightened as I was!
-Would just pay a bit more to stay closer and at a newer place honestly next time. Place is showing its age and its clear that many have stayed- you really do get what you pay for...