I put a B&M kit in my old 97 F150 4.6 w/ 4R70W AOD. It was a simple install, very good instructions. 2 choices of shifting, rv/street and strip. Worked very well, they even give you the drill bits. I had never installed a kit before, with the instuctions they gave me I didn't need a video..and I'm scared to death of auto trans's.
Transgo has like 5 different settings, some people don't like to have that many choices, me included. I just went with tried and true B&M.
I could get a 2nd gear scratch in that F150. Especially when I had the B&M electronic shift improver on at the same time. Man, that hit hard, too hard.