Hmmm... they've arrived.
First impressions straight out of the box. Very dark, lacking the sparkle and detail of the Etys I'm used to. I've taken the foam out of the blue filters, and it still sounds very smoothed/veiled to my ears. I'd try the white filters, but the ones that came are missing one of the acoustic inserts (the brown stuff you can see in the end). I'll have to get in touch with the vendor, hopefully I won't have to send the whole lot back.
Bass-led music is much better than through my ER-4s as you would expect. I could listen to anything through these without it getting tiring, whereas with the ER-4's I had to choose my music. On the other hand, more intricate acoustic tracks are definitely less enjoyable.
I'll give them some burn-in time, and try and get hold of the white filters. Hopefully I'll be able to tailor them to my liking.