I've never eaten at the Haus, but I'm pretty up front as to not being a food reviewer and more of a booze reviewer, thus I feel completely confident that I can say Haus Murphy's is likely one of the great places in the PHX area to refresh yourself with a disgustingly large beverage.
When I was visiting the Glendale area we decided to eschew the corporate Westgate area for Downtown and a better decision has never been made. The Haus served us giant German beers outside. They were large enough for us to take pictures of ourselves hiding behind them! What more do you want out of life?
Having grown up in the german-centric area of northwest Ohio, I have some sense of authentic German establishments, and this place has it in spades. Again, I'll leave the assessment of their food up to you, but if you're downtown and want to wet your palette with a giant fine German lager, you can't do better than Haus Murphy's. When I'm there, Ich bin ein Berliner.