My RE-252 just came today.
I like what i hear and i think they will complement great my RE-262.
RE-262 is more mids/bass focused , RE-252 is more mids/high focused.
It's too early to say anything on the sound (i like what i am hearing though) so i will come back , but having listened to them for just 3 hours , i like them more than what i liked when i heard the re-262 in its first 3 hours (they did improve A LOT though afterwards)
So far the fit seems fine , i like them best worn behind the ears with the large fake sony hybrid - the sound is improving and i am very pleased
The soundstage is very nice , and i like their highs a lot , and they are very transparent - which is really a nice copliment to the more warm , less high-focused 262
These Hifiman people really know their job.
For 150$ , definitely worth buying (bought BNIB new from another head-fier).
More impressions to follow in the next few days...
edit : these may end up getting more time than the 262...i guess the weird fit thing may have turned people away/off , but these are some great IEM's....awesome IEMs , thank you hifiman.