Quoting myself: "From my neophyte pov, they're great. I won't be able to do a detailed feedback as i'd be clueless as to how to do so. But it's the perfect version of the dt770 as iem to me. Great basses, a bit less "agressive" than w/ the dt770 maybe (mainly due to headphone vs iem if i had to guess), which is appreciated. I read the trebles were a bit high (or "bright" might be a better term) so if you're treble sensitive they're not the best. Dunno if i'm, so far [almost 2 months now] so good.
[...] After several long sessions though, i'd warn about comfort. I can feel a bit of pain in the lower part of my left ear, probably due to the weight of the earbud.".
I don't always have that pain though. So maybe it's just more dependent on how well they're put in place in your ears. I've to admit i never use iem with such ear tips. I mainly used earbuds you place in your ear without the need to sink them in, they were just there. But each time the cable was the main culprit in the long run, hence why i wanted some good ones with a solid cable. The fact the cable is even replaceable is even better.
Related to this type of silicone ear tips, it's a bit weird to hear your jaw so much, but eventually you find some neutral placement where you hear it less. Not dependent to these earbuds though, i assume it's always the case with such ear tips.
Also, a last (random) note is that you won't be able to eat with them, they won't stay in place.
Overall, i'm happy i got recommended these after the last earbuds (thin) cable broke (to be fair, they were very very old ones, Realistic SE-40, literally no basses (i was using a headset* for that, before switching for headphones (dt770)) but still a decent 2.0 sound). Perfect release timing ^^. From what i read EW200 are also insanely good for their price (a bit less than half the price of the ea500 lm).
*Which also had an issue. Not the cable for this one which was good, but the volume slider probably which had a faulty contact, i couldn't hear in both ears sometimes. It was a headset from 2011.
TL;DR: Title pretty much, "great sound, but [often a] slight discomfort in long sessions".