HPI 3 speed? Are they worth for BL?

[I Trust Tyler]

i just finished my bl conversion and my three speed didnt even shift unless i used 16+ cells and stock wheels, CRAZY fast once all three speed kicked in(still have to gear it down), i took it to my LHS and those dude were digging it, i would say if you have it go with it but, the gearing has to be low. i converted my savage to 32p and use a 66 e-maxx spur with a 16t pinion(9920 + 7xl) and it was still to high of a gearing to use all gears to there max potential.