Pros:

Excellent sound
Looks great

Cons:

none

Conclusion:

I have the non-scoped version, which I prefer (although they both look great, I like to be able to use a scope if there is one). The sound is ten times better than the original, if you ask me. You can hear the empty mag hit the ground, if I'm not mistaken. Awesome mod! Great job to all!

Pros:

Better sound (especially the silenced version).
Looks better overall than original

Cons:

none

Conclusion:

Great mod! I've tried several and this is my favorite SMG mod by far. The sounds are much better and I like that it is darker. Only thing that I would nit pick about, is that it might look a little more cool (imho) if it was a little more beat-up. Few scratch/ding textures would make it even better. :) But that's just me. GJ! And I never play in third person, so I could care less about clipping issues. XD

Pros:

Great design
Fun to explore a more open layout
Interesting and fun gameplay

Cons:

A bit too short!
Weapons placement

Conclusion:

This is a great campaign! Has nice flow to the game play, so it doesn't get confusing or repetitive. I didn't have any trouble navigating any part of it. There are enough paths and places to explore without seeming like a maze. Very nice balance.
My only criticism would be, that it takes a little too long (imho) to find better weapons. Also, I have to say that the chapters are nice and short, so the game doesn't become tiring, but it would be great if there was maybe one more chapter to lengthen the campaign as a whole. I think more campaigns should have shorter chapters, but maybe a couple more of them...if that makes sense. That way, the progression through the chapter would be satisfying, but you could play it long enough to really enjoy the campaign. It feels like it's a little short. (A nice break from monster maps with insanely long chapters though).
That being said, I've played it quite a few times and I still enjoy it.
It is a unique and creative design. Well worth the little time it takes to DL! I would ace the rating if it were a little bit longer, as that would make up for other con for me!!
Great job overall.