Pros:

fallout ... what else :D 
i love it when your starting l4d and you hear that music .... everythime I have to smile :D 

Cons:

none :D 

Conclusion:

love it :D 

Pros:

good model 
nice replacement 

Cons:

need a hand-fix 
standart mac10 model when laying on the ground 

Conclusion:

good model .. wait for a finished version

Pros:

New Realistic Model
Looks much better than the original

Cons:

How Hec just said there are no new sounds. But I think thats okay ^^ 

Conclusion:

I dont like the original Model but with your New Uzi I'm using this Weapon more often .... Big thanks ^^