I bought them today with a 50% discount. However, I am still a little disappointed. As with the L1, comfort is amazing. Build quality is not on the same level, but still good.
Sound, though, is a different story.
It's not just warm and bassy, but there's really missing some highs at the top end. Bass bleeds and timbre is really not so good. Resolution is poor.
For us head-fiers the M1 should not be interesting. The HD25-II easily owns the Fidelio M1!
I think masses will be better off with the M1 instead of Beats Solo or Bose on-ear, but sadly the M1 belongs into the same category.