Tom provided good info about what to use (thickness of glass, location of hinges, etc). Provided a brief sketch of what it will look like. Showed up on time with a helper and got it put in. Initial measuring was done well and subsequently, the install was straight forward and everything was square. I can tell he has done this for a long time.
I recommended Marlin to my friend, and his install was fine, except he got grief from the lady at the office when his glass wasn't ready in time. 9 from me.