Pros:

* Loved the puzzles, helped give it some extra fun factor. 
* Most of the puzzles were clever and disguised 
* Textures were well done
* Maps were huge

Cons:

* Some of the puzzles were a bit overboard. I liked how on the pipe wheels there was a map. But on the suspended crate we never could get the code. There's no clues around that we saw and with 4 buttons the amount of combinations could be in the hundreds. You don't have time for that with hordes every few minutes. 

* I would say since the map is really heavy on the puzzle solving, there needs to be more clues on how to solve them

* Also I know the map is supposed to be dark but I would use a bit more ambient sources. Maybe some strobe lights or alarms lights that go on and off. Some misc fires here and there. Just something to give some ambient light so some of those parts aren't so pitch black. 

* Not a big difference between Advanced and Normal. There should be a bigger gap of challenge. Advanced is good. But Normal was too close to Advanced. It needs to be a tad easier. 

Conclusion:

I think this map has a ton of potential. Enough so it could be top 10. But in order for that, I think it has to be better with the bots (I know you say it wasn't meant to be that way but bottom line is, not everybody can find guys to play with and bots are the only choice and to be one of the best maps, it has to be bot friendly). A bit more creative lighting and the puzzles need some more clues. We had a blast playing. We spent 7 hours on it and still could not finish. I look forward to playing this when it's done. Hopefully the designer tweaks those Cons I mentioned.