Pros:

Good skin.
Nice custom sounds.
Doesn't look too far from a normal boomer.

Cons:

None

Conclusion:

Doesn't stray too far from the normal boomer skin. Get this!

Pros:

Way better than the original, exactly what the M16 needs.

Cons:

Needs more wear and tear. The gun looks new out of the box, not how you would imagine it to be in a zombie apocalypse.

Conclusion:

I highly recommend this.

Pros:

Excellent quality skin
Suits the charger well
Makes me jump when it comes out of nowhere

Cons:

None that I can think of.

Conclusion:

The old charger was boring and this one is more what I imagined it to be like when my friend told me about the charger before L4D2 came out. Works great with beta charger sounds so check them out.