Just fetched mine from the post office as well (Got it from PJbox). The box came slightly dented, but everything inside seems to be well.
The thing can amp up the volume coming from my Eee notebook so loud I have ringing ears now (I really hear "fiiiiiiiiiiiiiiiiiiiiiiiiii…" atm, maybe it was a little much
), while usually I have to crank up vlc via its EQ to get usable volume >.< (that is with 95db/1mW phones)
Only thing is, I feel at higher volumes the DT231s got awfully piercing treble/presence with the e11… but maybe they just ARE like that and I just don't hear it without the FiiO, perhaps because I always listen at far lower levels.
Bass boost is noticable, but not much so, IMHO.
Build quality is decent, weight and size are more or less exactly what I expected after I read the first few "end user" reviews here.
It came pre-charged, current mode set to high (gain on low, bass mode 0) and has been manufactured on May 10th, as far as the user manual says. Getting the lid off was harder than I had thought, it sits quite tight. Not a bad thing, but at first I wondered if I did something wrong when it didn't come off =D
The switches are okay: firm, not flimsy, but not too tight either, a little more smoothness and
tactile "click" (it's quite audible though) to them would've been nice, but it's not bad at all as is.
Volume poti on the other hand has a wonderful click, although it's also not 100% smooth. And it
is quite firm, like the others said. I doubt you could ever turn it accidentally. It turns in the other direction I'd have used instinctively, but maybe I only feel so because the 0 is at the bottom when it's off, so that's where I looked.
Or maybe I'm just weird ;D. It turns clockwise to up the volume. The knurling on the knob itself is really rough, very nice.
The jacks aren't very clicky when you plug something in, but reasonably firm – I see no problem with them either.
So much for my first-half-hour-impressions.
