I wouldnt drive without one tbh, where would I put my arm then, anyway if you use common sense & read properly they're fairly easy to fit tbh, certainly not rocket science, some cutting out so can put the alum bracket through the centre console down onto the chassis but its kinda obvious what to cut out(to most lol) & the armrest covers up the cutout anyway
I prefer my old 8L & B6 versions that had the button to press in to lower where as the 8P & others have the crappy lift to lower system, cant stand it