Here are my initial impressions:
Out of the box, I was surprised at how light it is. Feels solid, but the buttons seem a bit cheap. Scroll wheel works, it is just has a different feel than my Fiio X3 or my iPod Classic. Screen is nice and clear. The volume buttons are on the right side, whereas the Fiio is on the left. The tactil feel of the buttons feels a bit loose. Once loaded the songs appear in the folder selection, mine has firmware 1.0 installed. The various menus are straight forward.
The sound, in one word, Nice! It is a little crisper than the Fiio, a more clean sound if you will. I would say it is similar to my iPod classic in that manner. It has clean high notes, but if you over drive the amp they get ragged (as does the bass). The bass is solid and well extended. Bass note impact is more a function of the headphones you are using. Midrange nice and clear. Compared to the Fiio, same amount of detail, the Fiio has a warmer sound than the X10, and the Fiio has a bit more bass impact when everything is compared equally (same song, same headphones, approximately same volume)
Noticeable bugs, when playing dsd files, it will skip and stutter if you try and search the menus, not so with 24/96. I have managed to lock it up when checking system properties. The ones listed by others, no gapless, click and a fraction of a scone cut off at the beginning.
Gap and cut off need to be addressed by Xduoo!
So compared to my other 2 dap's. The iPod classic is a much more solid software machine with no major bugs, it has a crisp sound and nice bass extension, the issues it has is limited to 16/48 files and fixed memory harddrive.
The Fiio has a nice rich sound. Bass is a nice impact and extension. Only one memory card slot, build quality is closer to the iPod classic. Software better than Xduoo. Can be used as a dac with USB input.
Value: At under $150 US, it is very good, at $175, a bit less. If it sells at under $125, I would say it is an excellent value. F Xduoo improves it's firm ware, this could be a killer deal for many people.
Bottom line: if you can live with current firmware issues and can get it for under $125 ($116 for mine) you get a very nice dap with clean sound and versatile file handling. At $175, Xduoo would need to do some serious repairs to The firmware.