Ha ha. I used to have sennheiser HD25s and these sonys definitely sound better than them, though the HD25s are for djing so I dunno really, I'm not an audiophile. The noise cancellation is really really impressive though.
They are definitely super comfy and don't weigh very much. I've been using really shitty ones for years, and do all my listening through my phone these days so the wireless option is good to avoid tangles. And as Corpsey said, cheaper ones tend to fall to bits pretty quickly so its probably worth the money.
I needed new in-ear earbud type headphones to use when rowing, ended up getting a pair of super cheap ($19) Yinyoo KZ ES4s that sound so good that I bought a slightly more expensive ($23) Yinyoo KZ ZSTX Hybrids for walking around that sound even better. I recall @droid posting in @sufi's thread about great sounding Chinese in-ear headphones that are really inexpensive, guess these are part of that.
maybe not audiophile, but seriously excellent sound, and amazing value. just try not to think about the conditions of the factory where they're made...