Bang for buck, Nice clean flat sound, isn't pure audiophile sound, but is quite pleasing once your ears adjust to them. Used these on Huawei p20 pro, ipod touch gen.5, Fiio m9 and Acoustic Research m200, all had their taste in sound signature, but generally was flat unless you EQ'd them and they responded OK to it.
I'm in love with how they just connect automatically as they're removed from the case, no fidgety turning them on and seeing if they're connected or not to a device etc, and the connection is really fast.
And I'm really surprised by the build of the case and ear pieces, really feels quality.
NOTE: play with the ear tips, took me a while to find the right fit.