I stayed few days with my parents(3 person) and we did spent very good time in lela's apartment. i was very busy till right before i go to wien and i didn't prepared almost NOTHING to get into lela's apartment, but she have patient and explain how to get in apartment again. she was very nice and kind.
+Metro is very close
+schonbrun castle is also close to walk only 5-10 min.
+fully equiped for a very nice stay. (hair dryer, washing machine, clean& nice place)
-if you have very heavy luggage, it would be a bit hard to walk up/down to move. of course there's lift, but you need to walk one stair down.
i also went to prugue after traveling wien, train station was very close.
So dear friends, especially if you're looking for flats which is very close to shonbrun castle and train station, pls don't miss chance! Here is the best apartment you're looking for.