I stayed several times in the FP Central in the past and never had any problems. I usually got a room with a nice big balcony to the backyard, which was quite nice and every time an upgrade.
The 4P Cnetral is in walking distance to the main station (15 min.), but the subway station is nearby. They have a garage (fee) and - which is the reason to me to choose this 4P instead of the 4P Olympiapark - sauna, steambath and small jaccuzzi.
The breakfast is served in buffet, but the room is a little bit small and becomes sometimes crowded; there is no restaurant.
Jan
P.S. Munich is my favourite city to collect SPG Stays....