firstly on how you use it park gear is closest to your dash you then lift the shifter knob up and back to your reverse gear pull it back and down from there is neutral, pull it back more 1st,pull it back again is second, and the last shift back for third,. secondly the point of a slapstick shifter is for in my opinion people who drag race you do not have to use a clutch because it is an automatic trans, it allows the driver to get as much out of his or her motor, also when shifting you do not have to take your foot off of the gas pedal. thirdly no it cannot make your car faster it just allows you to get as much out of your car as possible.
Slap stick shifters are for automatic trans , they allow only one shift at a time by hitting the shifter handle thus the driver in a drag race can shift to the next gear by looking at the tachometer not the shifter . Say the driver wants to shift at 7000 rpm, all you do is floor the gas , look at the tach , when it reaches 7000, slap the shifter , then do for the next gear. Makes for a more precise run with no missed gears.