Another vote for Shimano.
Even though I was super interested when Ltwoo released their groupset... the lifetime you can read in these threads is horrible low.
They absolutely underestimated what it means to develop electronics for the use on a bicycle.
If it is the goal to equip a 11x drivetrain, I'd rather go for Wheeltop. (2x11 Di2 is super fine, but the levers are not available anymore, so a crash could kill the whole groupset)
Other than that: clear vote for Shimano.
