These IEMs are incredible for its price. Have had them for about a year now, it is not thing of recent hype.
Changed cable and tips (would not recommended crystal copper cables, because highs are majestic already and the sound turns too crispy for my tastes). Regarding tips, JVC Spiral dots are working the best for a lot of users (me too).
Being honest, I don't have too much experience with real expensive IEMs (never tried 800$+ model and...