Pros:

-Very detailed
-All the attachments give off the placebo effect of the gun being more powerful

Cons:

-No new icon
-World model sticks into the floor
-Muzzle flash appears halfway through the silencer
-Default animations
-Strange hand movements after melee animation is finished

Conclusion:

Generally it's a great gun, but there are still issues that need to be addressed. Also I'd love to see a version that uses the animations from Doktor Haus'  M16A2 Reborn mod.

Pros:

-Brand new model.
-Great soundset.

Cons:

-flashlight/laser model

Conclusion:

It's great overall, but I detest that flashlight/laser model. Looks way too plain on this gun.

Pros:

-Superior effects in every way, compared to the stock ones.
-Unique nature of the mod, as particle mods are rarely seen.
-Improved vomit and smoke are very helpful in versus.

Cons:

-None.

Conclusion:

This is one of the must-have mods, improving the aspect of the game that's barely tackled by modders, and it improves it in a stylish and well-executed way, adding freshness to the game.. Watch the video for further proof, if you need it.

Pros:

-Crisp, great 4096x4096 textures and normal maps.
-Includes wound textures.

Cons:

-Lack of description file inside the vpk.
-Longer load times depending on the hardware.

Conclusion:

Overall this is one of the best special infected packs out there. However as it lacks the description file that would be shown in the game's add-on menu, it had led to quite an amount of confusion from the users.

Note to everyone else - even if you don't see this mod in your add-ons menu, it's only because the description file is missing from the vpk. If you put it in the addons folder, I guarantee it'll work.