Yes, I love Rusticana. It's a great place. BEST ribs I've ever had and I've eaten them all over the south of the USA.

Also for non-German food, try Vinh, great Vietnamese food not far from center. On the weekend the owner MIGHT do some magic for you. He's a total hoot!

For German fare, I always take my out-of-towners to the Ratskeller on Marienplatz. I think the food is very good and the clientele is mostly Bavarians! Be sure to try the cheesy spetzle.

For nice fresh food or a great burger try, Cosmo Grill. It's Germany's version of delicious fast food.

Also there is a nice noodle bar/sushi place next to the Apple Store off of Marienplatz. I'm not sure what the name is but I would often stop by and grab a bowl of udon noodles on a cold Muenchen day.

If you can get out of town, a trip to Kloser Andechs is a true local experience. The local monks make beer and then the restaurant serves typical Bavarian fare. It's about a 45 minute drive from the center past Lake Starnberg. Unfortuntately, public transport is an option using the S5. A rental car is a nice option for this drive. On Sundays they have local oom-pah-pah bands playing in the beer garden. It's a great experience.

I have many more recommendations. Just ask me what kind of food you'd like to eat.