Kevlar clutch?

I am picking my parts from Modern Driveline for my T-5 conversion, and they have a kevlar clutch upgrade, anyone know anything about these things? Will I notice an improvement over stock? I kinda like scratching 2nd and maybe 3rd gear sometimes.......

One more question, about how many hours should this take? I`m taking it to a shop to do this one.

Thanks for the input guys.

I ordered today and got the kevlar, I was thinking it might hold up longer then a stock one was main reason I went that way.