OMG these are the best headphones in the world!
 

I love the sound of these things. I suspect reviewer below had same problem as me initially- you have to wedge them right in your ears to get the great sounding bass to kick in! Noise isolation works well and very comfy too.
 

bought for running and gym excellent for the job ! dont fall out every 2 mins when shook about. Good sound quality for the price, very pleased with product Ive used more expensive earphones in the past couple of years but for running these are my favourate.
 

I can't agree with the above when he says they sound tinny. They sound absolutely fine to me - punchy clear bass and just enough top end. I wear these a lot travelling on the London Underground and they cancel out 90% of external noise which is just enough for me. Recommended.
 

This is the 2nd pair of in-ear headphones I have bought. I already own a pair of Koss Sparkplugs and I was so impressed by the sound quality I decided to get another pair of in-ear headphones, but this time try a different brand. I give the JVC marshmellows credit for being an easier fit, much easier on the ears, but they are greatly let down by the sound quality. I cannot hear any bass at all through these, and the sound is VERY tinny. As far as sound goes they are probably the worst, but as for looks and comfort they are the best i've ever owned. I use these whilst in transit, such as on the bus to work, as they look hot and are just so comfy. But when i'm at home, I switch back to my Koss Sparkplugs to actually "enjoy" music. If you are serious about music then i'd not recommend these, but if you are happy to just have a nice pair or headphones that look sexy and are comfy then these will satisfy you.