with my tri-ax, i have never missed a shift because of the shifter. whenever i miss a shift, it was because of driver error.
i am 6' even and i HAVE to sit with the seat all the way back to have adequate legroom. i had to reach for 3rd and 5th because of the angle the shifter handle sits at. for me, the choice between the tri-ax and the pro5.0 came down to what was more comfortable for me. in all honesty, i didnt feel much of a difference in shift quality between the two.
what I meant was, 5'5" AND had the seat all the way back -I am 6' and have the seat all the way back, I dont' have to reach for the shift, it's just not as relaxed as the stock shifter though...