Both left and right shifters are the stock ones on this Gary Fisher Hoo Koo e Koo bike from 2006. Shimano Deore SL-M510 left and right. They are quite old now and the right shifter was stuck a couple of months back from years of shed storage with the bike. I fixed that by spraying WD-40 into the shifter cable hole. Then later I ultrasonicaly cleaned the right shifter to try to improve its performance. It seems OK to use now in terms of pressing the levers, etc.

I have another bike (new cheap $400 commuter bike) with a 7 speed Shimano drivetrain (HG cassette, Altus derailleur) and, whilst it looks similar to the human eye on the bike stand with the chain as in the above photo, in actual practice whilst riding, there is very little pedal jarring your legs from the upshift on this bike. Which leads me to believe there is something that could improve the problematic Gary Fisher HKEK bike.