I am not commenting whether if HM5 is good but want to share my POV.
Good/Bad, Long/Short only arises upon comparison.
So when a headphone is good, which headphones is it comparing too? When it is detail, how detail are they and comparing with what?
When comparing with ibuds, my $20 Sennheiser HD201 is MegaHD-Fi for that instant. When comparing with my HD650 it sounds Low-Fi.
Sometime when someone upgraded their audio, the new purchase sound so much better than their existing one (that's why they upgrade in the first place). People share on the forum, more people purchase then and found it is true and recommended them. We men also like new toy, very much like when we are young "My toy is better then yours" and our friends wanting the same toy for themselves too. So when someone have more capable headphones purchased the same set, they felt disappointed.
So you see, use it as a guide but nothing beats listening to them yourself. Take Sennheiser HD800, these are expensive headphones that Sennheiser experts took make years of experience to produce yet some people hate it while some like it. Some even like a JVC $50 headphone better than the HD800. Taste is very subjective and then we have the type of music and amp/dap that are all difference.
So importantly, when something is good or bad it is good to know they are good comparing to what and vice-versa.
Edited by whoelse - 1/10/13 at 1:25am