The speed lever was a fine idea except it only worked one out of about every thousand times you used it as intended. I gave mine to someone I don't really like that much at work.
I'd like to think I'm at the stronger end of the cyclist spectrum and they definitely can be hard work but they're also pretty quick and can be great when your hands are a bit wrecked.
I have a couple of those, well 1.5 since the first one I was sent didn't have the second lever in the middle. I don't think I've ever used them though. I have used the Speedier Levers though:
https://www.amazon.com/CRANKBROTHERs-Crank-Brothers-Speedier-Lever/dp/B008UY1MXW
Not these
https://kk.org/cooltools/crank-brothers-1/