Pros:

They work in multiplayer client side so no one else see them but you do.

Awsome for minecraft players.

Cons:

Arms are not that great when using melee weapons

Conclusion:

It is a good mod for everyone but people who use melee and like a clear screen might have some trouble

Pros:

Perfect hitbox

Great for minecraft players

Works with no problems

Cons:

People that dont play minecraft aren't really attracted to it

Conclusion:

It is a awsome mod and everyone who plays minecraft should use it