Remember the burn-in. They can sound a bit harsh straight out of the box.
Manufacturers recommend 200-300 hours burn-in for those bio-cellulose drivers to sound their best. I didn't find they changed any further after 100 hours or so, but YMMV.
They are without doubt one of the best IEM's I have ever had in my ears at their price, and compete well with IEM's at twice their price.
Yeah, that's what I was expecting, but I thought they sounded great out of the box - even compared to the W3. I think I'll go with the grado style approach and just burn them in by listening :P