Check-in: Went smoothly
Location: The apartment is close to an underground station (5-7 min walk). Downtown isn't right there, but we had great weather and the walk takes you through a pretty park along the river. Takes maybe 20-25 minutes (but of course you could just take the metro.
Apartment: There are three narrow floors with a spiral staircase connecting them. The kitchen is on the bottom floor (didn't use it, but looked nice). There is a futon big enough for two on the second floor. The third floor has a bathroom and a loft bed big enough for two directly over the stairs. Obviously, don't rent this place if you can't handle the stairs. The beds were comfortable, but the loft is very close to the ceiling and was much warmer than the futon. This could be rough if it's hot out. Bathroom was fine. There were also two pleasant balconies on the first and second floors (0 and 1 in Deutschland). There is no washing machine (not necessary, but nice). The wifi worked well.
Overall: Pretty great. A little pricey, but not really for Munich. We had a very smooth and enjoyable trip.