Pros: Almost everything
Cons: The iggy feet u loose a lot as they are badly glued!
As many said already before me...for the money u wont get better amp..and dont forget to do the class a opa627 opamp mod...as that gives him that extra! U wont regret when u buy this little baby..it even drove my he500 very well! But is best paired with a phone like the he300 or a grado..to my surprise it didnt do well with my iem the westone um3x


I just picked one up for a steal of mass drop, so i'm waiting on his arrival.
check this review
http://www.headfonia.com/matrix-m-stage-class-a-biasing/
hope this helps a bit..oh yeah..tamaudio has a plug and play opa627 for ur m-stage..its a piece of a cake..
and about learning to type..maybe u have al the time in the world..i dont..i work..and i am not unrespectfull like u do..i wrote what i wrote as how i feel it..i can write a two page review here..but i didnt...seeing how u react ur maybe a bit to slow to check all the reviews all over the net and on headfi to know what i say is true about both..okay they are not perfect..but..for the price they are a steal!! oops...i apologize if i now sound a bit irritated...and as english is not my native language i probably wrote this down wrongly!..seriously..we are all here to enjoy music..some have long reviews..i am a bit short..but i damn know and believe in what i say...i wont say anything about things i dont own in contrary to some here on headfi!!!...i respect anyone here on headfi..as long they respect me!