Just got the Zwift Play controllers and attached them to a ICG Ride CX bike with dropbar handles.
This was quite a pain in the ass, as the bars are ways thicker than the controller encarvements and the rubber tab is really short. I had to strech it with quite some force to attach it.
And if someone has no dropbars, Play is useless.
You could have constructed it in a quite more flexible way, by having no fixed circumflex handle, but just two rubber bands like a wristband and a 180 degree turnable attachment to the controller. This way they where more easily to attach to different styles of handlebars and brakes.
Maybe you can keep this in mind for a Zwift Play V2 controller?!