The apartment is only 3 or 4 minutes from the Kolumbusplatz U-Bahn (subway), connecting to the centre of Munich quickly and easily (the subway is very easy to use and cheap). Apollo was very helpful and check in was easy. The apartment is spacious and clean, the sofa bed is a little firm but that's what you expect from a sofa bed.
Shops in Munich are closed on Sundays which is something to bear in mind if you arrive late on Saturday (which we did). There was a really good Neapolitan pizza stand (Forza Napoli) around the corner that is only open on the weekends and does good pizzas.