1. Bass shake/slam/hit is underwhelming. They're there, but I wished it'd rumble my entire head, instead of feeling like minor pushes into the eardrum.
2. Soundstage is underwhelming. It feels like it reaches out to roughly 30 cm radius max. While much better than my RE600 IEM which feels like roughly 5 cm, it wasn't the orchestra feeling I was lead to believe.
I had hoped it was because it wasn't burnt-in enough, or my brain not adjusted enough, but these 2 aspect remains. I've tried playing around with EQ a bit, it seemed to just make the soundstage even narrower, while making bass louder without increasing the shake. FYI, I'm using Audinist HUD-MX2 with non-balanced cable.