Here's my Comet story.
I had an X that I liked at the time, but either it wore in, or my power made a jump. Anyway, I couln't conrol it any more, and eventually lost it.
I came across some ESPs, and grabbed 3, since I knew some people swore by them, and I knew they weren't widely available. That was maybe a year ago. I'm down to one now. I don't always put my name in discs, but I did these, and I hope they were just so lost that no one's found them, but I doubt it.
I found the ESPs to be especially sensitive to power-down percentage, if that's a phrase. I couldn't find that sweet spot. I've got one left, and I like to use it in situations where the shot is sort of buzzy, but I'm dealing with tight/tricky lie and limited range of motion.
It's one of those discs that seems to become more and more useful, the more consistent/confident you get with your power control.
I'm so not there yet. But for tee shots/longer approaches that the Comet would be good for, I've for whatever reason had better luck with the Fuse. Probably just biomechanics.