Hello,
I´m using a Sena SMH5-FM (DualPack) since I switched from cable to BT, and it´s satisfying me.
But it must be determined, every rider has other desires.
The BMW-Audiosystem denies 100% cooperation with third-partie-Headsets, like support of the magic wheel or connection to second helmet (respectively second headset).
(Most time riding alone, and on my other bikes there is no such wheel.

)
To me the benefit of change the operating unit (of the Headset) between different helmets in seconds prevails.
Therefore first clear your needs, then choose or try out.
In Germany several riders use "blue bike" and "blue twin" devices, apparently a "high end"-device, 100% compatibility to BMW-Audiosystem promised.
But very expensive, no self-mounting possible.
Not my case at all...
Gruss Frankie