Summary: I bought a pair of HM5s about 6 months ago. They give you absolutely great sound for under $150 but I ran into a big problem. Both sides where the slider connects to the headphones started to crack within a week of one another. A little later pieces of plastic started falling off altogether and now I can't take them off too fast without cutting my ear. Before you buy try searching about the HM5s build quality, lots of complaints.
Summary: I liked these when I first got them but over time as I listened to more and better headphones realized they are not very good. They're not all bad but I think the cons outweigh the pros. There are already enough hyped up positive comments from tons of people, so I'm just going to list what the problems were for me.
Not really all that neutral. Perhaps more balanced relative to some of the wilder headphones out there and mostly non-offensive, but that's about it.
Pros: Comfy, comes with lots of accessories
Cons: Not all that neutral, numerous cons in the sound outweigh the positives, build quality is meh