Munich is a fun city to walk around, and Marienplatz is really busy with a great vibe, particularly when the Glockenspiel show is going on. I hate to say it, but the Glockenspiel show was underwhelming. Sure, it's cute, but it's REALLY basic, and I wouldn't bend over backwards to be in Marienplatz at 11am/12pm/5pm just to see the show. But if you're close by, it's fun to see. Regardless, sitting in Marienplatz to have a coffee or snack is really enjoyable even if the Glockenspiel isn't going on.