Even if you like LPC, it´s a one and done thing.
We actually liked the location of Qsine on deck 11.
On Constellation, that´s where Tuscan is (Constellation).
Agree - and then it was topped and made worse by turning Qsine into LPC...
So the choice of specialty dining on M class became non-existent for us.
Otherwise I also like M class for more exotic destinations.
We have Bose over ear and Bose in ear / earbuds.
For sports etc. I use in ear, for airplane travel I much prefer over ear because of the better noise cancellation and comfort.