Quite interesting little players. M3S is quite slim, just a little bigger than ipod nano, and it can get pretty loud. I don't even raise the volume that much whereas other players I have almost double. Considering how small it is, quite intriguiging.
M1-3s all have usb DAC feature that just works when plugged to windows. Although, not touch screen, pretty responsive and ui is better than I expected of a brand I never heard of. It seems like they made sure good functioning of software.
I like the size of these players, and the low-end response you get from them. The player damps the bass of the Andro. Could be one of the good matches due to it's clear bass response. It's a clear sounding player given Andro can be a bit on the warm side depending on the source.
Overall, when I listen to it, I get that musical feel with certain tracks. Sounds a bit different from other players.
There's slight treble prominance of a narrow band I can hear, can bring out slight sibilance to certain recordings, but not in quantity as it's a narrow band. It's a good player for the price point. I think it's more musical than others I've heard at the price point.
It does have that ambient feel sounds to them we refer to as sound stage.