Apart from on-stage monitoring I use them for in-studio monitoring (kinda "different angle"), listening to music on the go (not the best experience), working with sound "in the field". Sound quality, compactness with good isolation made them live in my EDC backpack just in case.
The comfort is not ideal — I can't say they sit perfectly in my ears with any of the in-the-box ear tips, but these are my first in-ear headphones, so maybe I'm still getting used to them even if it's been a year already.