Not much to say - best iems I've ever used, and I've tried a few.

I used to love my SM3s. Ranted and raved about them in the forum. Threatened to send the boys around to deal with anyone who disagreed.
 
Then I went off them and bought some Ety HF5s and RE-252s, and I'm much happier now. Sold my SM3s and don't regret it.