Like swalker said, they are indeed Cresyn OEMs.
Even before this model Cresyn (formerly known as Leemax) OEMed to Audio Technica many other lower end earbuds.
Anyhow.
I just got the Cresyn here in Korea for about 45 bucks. The build quality is simply top notch, and IMO these are the best looking buds out there right now. Simply b-e-a-utiful.
Sound wise - it REALLY depends heavily on how the earbud is placed. Well, same with all earbuds, I guess, but since the Cresyn does not have partially covered cap (as in the E888 and other Sony models) it is crucial that the driver doesn't press firmly against your ear... it can sound really muffled if wrongly placed, but if it is tweaked well then it can sound very airy and pleasant.
It's not burned in yet and as people say, its sound will improve drastically over the next few weeks, but here are my initial impressions anyway.
Its sonic signature is similar to the E888 - focused more on the highs and mids, more on the bright side. The Senn MX400's sound I felt had much deeper presence, but at the same time, not as airy and transparent.
The sound does seem colored and indeed veiled compared to my Etys (obviously) but I was very very pleasantly surprised when I first put them on - even with my very spoiled ears (after hd600s, k501s, cd3000s, er-4p and more) they sounded very good. I would personally rate it higher than the E888s - of course it is stricty IMHO - I felt it provided an airier, more transparent sound compared to the E888s. Maybe it's just the way that the Cresyn can sit on my specific ear shape... I can get it so that it just doesn't sound like an earbud anymore. Of course, I lose a little bass but they're earbuds anyway, there's not much bass to lose in the first place...
And they look sooo good...
Well. After a few more weeks of use I'll post my secondary impressions. As of now, I am very happy with my $45 purchase.