Several days / nights of listening are revealing the LS8+ to be very, very refined. The overall resolution is the highest I've heard, with a liquidity and effortless that makes the AUD-8X, and 1plus2, sound comparatively aggressive. It's a very inviting signature.
They insert pretty deep - past the second bend - so require a second twist upon insertion (a first for me). See how much longer the canal is than the 4-way AUD-8X:
I can therefore imagine a noticeable difference between the universal demo units and custom versions (as described by Avergage_Joe in initial review).