Just got Dayan Tenyung M.
Quite smooth out of the box, and very very quiet. This one will be my to-go cube especially when I fly

(for sleeping fellow air passengers).
A little bit scratchy, but became much smoother after several drops of D&M. Tension is a little bit weak but I like as it is. There are two more different spring sets (different length) - so, 3 different tension settings (not advanced like moyu or gan but the basic physics are pretty much the same, anyway).
Magnets are donut shape, not disc. That makes the magnet strength a little bit weaker but effective to a wider range, the way I like. I prefer larger disc but weaker strength for that reason.
It may not be good for aggressive cubers but good for BLDers. Between GTS 3 (DIY) M vs. Tenyung M, my main will be still GTS 3 (DIY) M.