This is just my opinion/experience. I us d to be all about IEMs. The convenience, portability, ease to drive. Then I discovered over ear cans. I've listened to a lot of good IEMs, and in general they are more crisp than most Over ear cans, but great sound in your head feel I get, just doesn't beat a slightly less clear but wider presentation, for me. The ONE In ear that changes that feel is the Isine 20. But it's open back, so still for home use. Anyway, I love the Nightowl, because the presentation feels different than most headphones. The highs are crisp and clear, mids are present, bass is good, articulate. For instrument based genres, absolutely use the US earpads, which decrease the mid bass a bit to shine a greater light on the upper mid range and overall treble. Still reach deep in bass when needed. These pads are great with jazz, classical etc. The musicality is excellent. Will feel like is coming from a wider area than IEMs. Nothing is missing as far as frequency is concerned. And if you lay on your back, you could have these on ALL day