Just got one. Its on Listen Up glorietta and Listening room Megamall for 3350. (its 3700 even on tpc and other sources)
While I do want to describe its sound characteristics and contribute to your curiosities, im not that experienced yet and this is the first dac ive used/heard hence I can only compare it to my sources, Laptop and IPod Touch 4. Nevertheless, I'm in awe on the difference from my onboard laptop's sound. The details are crazy.
In comparison to the ipod touch 4's line out, this is also much superior; more detail, better mids, better soundstage. (sorry im not as articulate as any pro reviewer)
As for the AMP section, i have not auditioned it yet since im using this for my speaker setup. There is a big issue with the headphone out with the IE8i minijack, it is virtually unusable--it is either distorted, or sounds hollow--- unless i switch to a normal minijack (stereo). i heard this issue will be fixed on future revisions.
I was also able to audition this side by side udac2, and for me e10 is noticeably better too. Again, sorry for lack of articulation; I have just tested this 2 hours ago. Will be back with more if I manage to pull off a proper sound review hehe