I visited Salzburg with my wife and 2 year old daughter. We were welcomed by Layla (hostess Bettina was out of town) and she kindly showed us around the apartment and gifted us a box of Austrian chocolates. It was extremely clean and well put together. The kitchen had all the appliances and kitchenware you might need, and all new and in great condition. We were very impressed by the pull-out sofa bed, as it was one of the nicest we had ever slept on.
The location of the apartment was great. It's very central, a two minute walk to the grocery store Spar, as well as a two minute walk to the street Linzer Gasse, which has great shops and restaurants and can take you right to old town. Also, right outside the apartment is a bus stop where you can catch the number 2 bus to the airport.
Overall, we greatly enjoyed our stay at Betinna's apartment and would recommend to anyone travelling to Salzburg.