B&M Shit Improver Kit

Has anybody installed one of these on a 4wd 1999 4.3 vor? What kind of changes were felt? Noticable? Bad idea for a daily driver, 40 miles round trip? I've had it (Shift Improver Kit) for about 6 months now and I'm kinda hesitant on installing it due to it being a daily driver. Any help would be great.

What is the EGR mod? Does anyone provide aftermarket MAF's & Throttle ßodies? Intake Manifolds?

i have installed them in other transmissions, and they give u firmer shifts and higher rpm shifts, it shouldnt be too bad of an idea for a daily driver

So this idea would be okay? The tranny is getting replaced right now and I don't want to do it again out of warranty. I already have the kit (bought it six, seven months ago and need to get it put in but I don't want to if it will screw the reliability.