Very please, similar to the UM3X these replace, but a huge improement. twister6 on Headfi gave a good review of these in the Westone UM PRO Series Thread and I think the review is very accurate.

I own the W60 (very good) and W30 (for backup, Westone iems fit me so well I hardly notice they're in) and wanted to try the Um Pro series having read so many good things about them. After a few weeks use I've written this short review after listenin...Read moreg in awe to a Rose Royce album, which is very well mastered, and I use mainly for reference purposes ( I normally listen to heavy rock), maybe in part it was my new player reaching 100 hours (?) but I much prefer listening with these UM Pro 30's V2. I'm not exagerating when I say I had tears in my eyes the music sounded so good. Of course this is how I perceive them but the fact I'm leaving a review hopefully speaks volumes.

Also thanks to Chris for helping me beyond what I expected regarding another purchase, and answering my many general questions on different products very quickly.