I have changed to Relevant (original one without Coton's name) for about 1 month and I felt minimal uncomfortable with it. My previous blade is Mizuno altius ST5, which is a 5-ply wood blade, paired with Xiom vega pro (forehand) and Donic S2 (backhand), both are pretty old. I switched to vega X and BTY rozena on Relevant.
Overall I think it's a relatively soft and controllable blade, but still provide enough power further away from table.
When flat-hitting with little power, Relevant feels just like a wood blade, and topspin with little force gives a high pitch click and vibration, a feeling familiar to ZLC blade. Though I feel this blade requires less power to play compared to ZLC.
When forehand loop further away from the table, the blade has more power than ST5, and surprisingly the dwell time even feels better than ST5. Since the arc is high, I can make safer strokes too.
My backhand loop is not that great, but I feel it has more speed than ST5.
Since the blade is soft, bocking and flat hits are easy to control.
The only downside is the handle, which is too thin for me (FL version). I hope I can overcome this, since the blade is so comfortable to play.