Drivetrain Faceplated Tko 600?

I'm starting to hear more and more people doing this to their TKO 600s. What, exactly, is faceplating a transmission? What is involved with doing it and what does it do? Is it just to strengthen it or does it make it clutchless or something? Please enlighten me. I'm wondering if this is something I might want to do to my TKO 600 at some point.

Not saying I want to take that plunge. I was just wondering exactly what it does. After serching youtube yesterday I found out. Actually it seems like its ok on the street for a non-daily driver. There are some guys out there DD cars with them though. After watching a few videos of guys driving them normally on the street, rev-matching to downshift and double-clutching didn't seem necessary. I'll see how my OOTB TKO 600 does with my setup. I've heard a few things about them being a little difficult on the 2-3 shift but I'll see. I learned back when I first got my 3550 that if you don't do a good break-in on Tremecs then they will be really notchy and thats what causes missed shifts. I bought my 3550 slightly used but it must have been broken-in easy because I didn't find it to be overly notchy and I only missed shifts when I tried to powershift at too high of an rpm.