I need to give credit to this headphone--It is the single biggest factor that has made listenting to recorded music more enjoyable for me than ever before.
I've been a budget audiophile for over 20 years now. Without the $$$$$ for high-end speakers and amplification, I've gravitated towards headphones.
Including the MS-Pro, I have a HD650 and a K701. For amplification, I have a Headamp GS-1, a Corda HA-2 mkII, and a Larocco PRII mkII.
I've been in search for "that special something" for years. I've been happy with this hobby up until now, but the MS-Pros have been such a tremendous revalation that I've been inspired to come out of "lurk" mode.
I'm not a great writer and I don't have tons of time to describe what I am hearing, but I will say that in my opinion the MS-Pros are "balanced" and "they have it all". Previously, I would go back and forth between my "warm and relaxing" HD650 and "airy and detailed" K701, but I was never completely happy with either one. The MS-Pro strikes a perfect balance -- tonal neutrality -- all of the details are there, and presented in a very natural way.
The one downside is that I've been so enthralled by my MS-Pros that I've purchased a new CD player (Cyrus CD6SE) and I have a new amp on the way (Woo Audio 6 SE). But it is worth it. Listening to recorded music has never been this rewarding.