I've had a long journey, IEM-wise.... EX51, CX300, S.F 5 EB, S.F 5 Pro, ER6, Vibes, every MylarOne, Atrios, SE530, q-Jays, etc, etc. Now I have the UE11.
They're neither more nor less comfortable than most universal fit IEMs I own - but they do indeed have better isolation, and most importantly they combine all the positive sonic aspects of my former favorite universal IEMs (Atrio bass, SE530 mids, q-Jays treble, Vibes soundstage) in one - and even improve them by a bit.
I was always annoyed that the Atrios have excellent bass, but lack clarity and treble, the SE530 have a great midrange, but no real bass or treble, the q-Jays sound too "hollow" with little soundstage, and so on. Why can't there be one IEM that does it all right for my ears?
So I took the plunge and got me some UE11, "straight to the best", as the catchy headline of this thread reads. I usually try to test phones before I buy them, but with the UE11 it's of course impossible. I also give a rat's ass as to what most people write about their sound quality, since I found out I usually hear very different things than what people write in reviews - especially the overly poetic waxing that often can be found here on Head-Fi.
I'm perfectly happy with the results, and I do not regret the purchase one bit. For me, the UE11 are a lot better sounding than the other ~20 IEMs I know well. If UE would release universal "Quadruple.Fi 11 Pro" I would still get the custom version, since the Super- and Triple.Fi housing is one of the worst for me and feels very uncomfortable in my ears.
This doesn't mean the UE11 is the best for everyone (especially for fans of the ER4 and such), just like I certainly wouldn't like the UE10's lower bass response. But personally, I sure am glad that the slow journey "straight to the top" was the right thing for me.