To be honest, you don’t really need one unless you plan on going to the track. A QS allows you to do clutchless up shifts which on the track adds benefits like being able to easily shift gears at lean (coming out of corner), reduces the work you left hand does (list of shifting), etc. An auto blipper allows both clutchless up shifts and down shifts and again is meant for the track. I realize people can use this stuff on the street, and some of the newer bikes come with it, but in my opinion unless you just have money to spend, it’s not worth the cost for street riding. Use that money on fuel lol.

I added an auto blipper to my 16 track bike but to be honest I did it for one reason, to reduce the work on my left hand to avoid fatigue.

 

I've had it on 2 other bikes plus my new incoming 2022 R1 has it.
Love it! As mentioned it really only benefits you on the track, but is still fun on curvy mountain roads.

 

Once you had one, QS or QS + blipper its tough to think of being without it. Even for street. Just so much less effort. In terms of which one to get, depends what you’re after, just the function or more?
The more takes you to a flash where you could then adjust more aspects in the ECU.
Otherwise look at Translogic. Had the QS on a 2009 and is smooth as butter. They have a blipper too. Easy enough to install if that is what you like.
Certainly highly recommended.

 

they work better under hard access/decel so on the street i hardly use my quick shifter or autoblipper

 

I do clutchless up shifts without a QS (09'). Some will say no issue on transmission, others will say don't do it. I've done it for as long as I've owned bikes with no issues. I'm not brave enough to try clutchless downshift with a throttle blip but I've heard of people doing it. Besides, once you find a rhythm with fast clutch/blip downshifts, it makes the ride more fun/interactive.

 

I've done some clutch-less up/down shifting on my R1 in the past. My street ride these days (KTM) has an up/down quickshifter. The up-shifting is nice to get the best acceleration (nice for making passes), but honestly the down-shifting is the most enjoyable to me. You get the max amount of engine braking in the down-shift, and that lets you run into corners a bit more aggressively. So I at least really like that implementation.