depending on mileage, the oem quickshifter is basically a consumable...youll be lucky to get more than 5k street mile...i'm on my 4th currently on my 1299...the weakest link is the crappy plastic push button under the black cover...it quits recognizing the push and you will not be able to shift...but after a couple retries, one will work and bike will shift...
So i have a couple extra spares on my work bench, as i scope them up every time they are on ebay or this site...once i'm all out of spares, ill have to go aftermarket...all the research ive done shows the cordona ones are amazing. They dont have a push button setup, its a strain gague...seems to last a lot longer, and its a little more configurable.
JAG