PROS: I am very impressed by these headphones. Great build quality, very compact and very good (and cool looking) case which is included. Very good sound isolation for loud club environments. Over the ear comfort is wonderful with very little if any ear fatigue over several hours. on the neck comfort is not bad, but not the very best. I had been using the classic Sennheiser HD 25's and switched to the V MODA M 100's and could not be happier with them.
CONS: The only con that I see isn't really with the headphones themselves, it is with the cable. I move around when I play so I ordered the coiled cable which in and of itself is great (I also do like the Kevlar covered cable that comes with them as a back up), but it (the coiled cable) doesn't fit in the case that is included with the initial order. Perhaps a small con but it is all I've got bad to say about these outstanding headphones. That's the only reason they got 4 stars instead of 5!