Thanks for the review bigrocoobafan - it was an interesting read.
I've been using my BA extensively for around a week now, and concur with you regarding SQ. Coming from the J3 and Clip+, resolution / detail has definitely been stepped up a gear, as has depth of sound stage. 3D is definitely the word here. The presentation is also very spacious / airy, with noticeably better separation, making the J3 sound muddy and congested in comparison. My real suprise is that this doesn't come at the expense of musicality. The sig is definitely brighter that what I'm used to, but more through transparency and clarity than treble emphasis. I'm hearing no bass roll off, and control is excellent, though I would prefer a bit more quantitatively.
I have no problems with the UI in terms of navigating - it's reminds me of cross between the N2 and Clip+ - it's not going to win any beauty contests, but is perfectly functional. There are a few bugs which annoy me however: 1) navigating through albums / folders whilst listening to music causes the music to cut out, or jump very briefly. Does anyone else have this? 2) Turning the BA on and selecting "Now Playing" does not resume the song that was playing before it was turned off. 3) The names of individual songs scroll too slowly across the screen to read the full song title (I problem I also had with the N2).
I've no problem with the form factor, which obviously oozes audiophile-style over convenience. The edges are sharp, the corners very pointed, so it wouldn't be the best dap for running or working out (fine with me, as I do neither!). I'd like some options for customizing sound, as I'm quite partial to a sneaky peak at the bottom end and the presets are, imo, not worth using. Some more storage would be nice too, as I'm not a fan of carrying multiple SD cards.
All in all however, I'd say I'm very happy with the BA. After all, the factor which I put above all else - SQ - leaves all my previous daps in the dust. Furthermore, the level of SQ you get for your money is, imo, exceptional. I'd therefore recommend this little dap without hesitation to anyone looking to take transparency, resolution, depth of soundstage and dynamics up a notch or two over their J3 or Clip+. It has a very dynamic, 3D, spacious and transparent presentation which although bright, achieves a wonderful sense of effortless and natural musicality.
Lastly, I should highlight that I'm using the AUD-5X, which have never sounded so good. Those TWFKs really sing with the BA, sprinkling detail and sparkle galore.