We stayed at Max Lodging for a month during Oktoberfest. While it was pretty expensive, it was a great location, a lot of space, and very clean and modern. It felt like we had our own, new apartment in Munich and it was a very comfortable space to be in.
The only real drawback was the fact that the laundry was a laundromat style, and was pretty expensive. They did, however, provide a change of bedding and towels every week free of charge.