Dear Fiio,
I am your customer since the first gen X3 appeared. I love the 2nd gen as well, maybe even more, despite of the lack of physical bass and treble adjustment. It is just a giant leap in sound quality over the first gen. Extremely good value for money, especially for £109, as I was one of the first 200 buyers. (From old X3 owners.)
There is only one annoying issue, which I would be happy about if it would be solved in the future. It is constantly loosing the favourites list, which has been built up with 'hard work'.
From the 4-5000 tracks I keep on the X3ii there are maybe 4-500 which I really like at once. (It is always changing.) So one by one I mark them, and by time I build up my 2-300 track long list of favorites. (I almost always listen to music in shuffle mode.)
The problem comes with each and every fw upgrade, and also if I change between DAC and player mode too often or too quick. Not to mention the random freezes, which happens every 2-3 months once. Each of these mentioned cases results in loosing my hardly built up favorites list. This is a pointless function, if it is not working properly. So either remove it from X3ii, and force people to use playlists, or make it work and last please.
This minor issue won't turn me away from Fiio by the way, as I just love the sound and value of it.
Thanks for your great work!