I have a friend who has full sets of so many types including Signature circs, ChiaGoo, Hiya Hiya, KP, etc. and now she's bought a few of the new carbon fiber needles (not Webs brand) to test. I think she's made of money.
I have a few of the Sunstruck and a few of the Harmony and like them a lot. I prefer the plain ones, but I bought the few Harmony a few years ago. I'm using them now for the hats I've been making on Encore. Lovely!
Unlike your friend, I can't have them all so I will enjoy the ones I have. I think it's great that there are different needles so we each can use the best we can get for our individual knitting styles.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper