Hmmm. I had the beef tendon noodle soup. There's only one size for it and that size is "medium", the twice-the-size-of-my-face kind of medium. I went alone too and I absolutely hate not finishing my food, so I forcefully finished it and this is probably why I didnt fully enjoy my experience.
The taste of the broth was really rich, the meat was meat with tendon rather than being tendons (which is what I was hoping for). It's also quite on the more greasy side for Chinese Lanzhou Lamian, but overall OK.
Just make sure you have a super huge appetite/bring a friend. I still feel it in my stomach and that was two weeks ago.