I use Volta all the time and for me it has been really good considering the platform we are on, windows and linux clearly have vastly superior alternatives.
I use Volta for:
1) limiting package power consumption, that way some random website or compile doesn't suck up my battery in an hour, I can be certain to have at least 6 hours of runtime.
2) disabling Turbo Boost, while it's great for for some people i'm sure, personally it's just not for me, either I need a long workload in which case turbo boost is bad because the overall performance drops and noise increases or It's some obnoxious add on a website that just absolutely have to run at one million fps.
3) long compiles, if i compile something that i know will take 1+ hour it's really really annoying to listen to the mac whine away, and while i could adjust the fan speed to force it to throttle that makes me uncomfortable, too many mac's have fried at higher temp's for me to buy into that anymore, and when I used to have it sit there and run in a hotel room when I come back the room would sometimes smell like electronics, with Volta and alternatives it's never an issue.
It sucks that we have to have custom SIP for Volta to work, and it would be nice if it was possible to use it to control gpu performance too (there is a github command line alternative) and there are so many features it does not have, that said it's the best tool that i've found to control cpu performance.
Right now i have 60mv undervolt, i think it's stable to 95 but it's been a while since I tested that.
