Im not pro. ;)
Felt like an expansion. No dialog, not much waiting, usually just action back to back and exploration. Rarely got lost a few times. Jane doe is one tough badass.
Chapter one was three years worth the wait. I loved this game, and to think, it's just a mod. It makes me look at the current games we have and just go like 'whoah, this is better, and it's all for free.'