Staying in Matt's apartment was overall a great experience. Host wise, he met up on time as expected to let us into the building and was very informative on how to arrive at the location and answering any questions we had beforehand. After arriving in Munich, he had several suggestions for things to check out around Munich and was overall a nice and welcoming host.
Apartment wise, the space is quite small for 2 people, but as long as you're not spending most of your time there it's great. It was clean and had everything we needed. The bed is a foldout couch. so be warned. However, I still found it to be fairly comfortable.
Convenience wise, you're close to the s bahn, several restaurants and beer halls, including Paulauner. It's a little outside the city center, but for the affordable price it was definitely worth it.
My only complaint is that there was no fan to cool the room down. Obviously it's not Matt's fault that there was a heat wave when we were there, but it was pretty uncomfortable to sleep for much of the night because the air didn't cool down outside until early morning. Put a fan in there, and it's perfect.
Overall we had a great experience staying with Matt and I'd highly recommend you do the same.