The shift knob is very easy to install, simply sit on (if you have the old removed) and you're done. Warning you need a pair of pliers to the collar to attach.
The quality is not particular! Gaps are moderate and much worse after a week use comes a cap with the corridors opposite so you have this plastic cap in hand.
In addition, the feel of this plastic cap is very bad. They crack and gives way if you exert a little pressure on it.
Not really recommended, looks only at first glance look good, alas!