its a good set of earphones. NOT as excellent sound quality though, but very handy for outdoor use specially in gyms. Its not as good as the other sennheiser earphones avaliable in terms of sound quality.

i own one ... though not bought from flipkart

About Prod.
Excellent for gyming n sports
Doesn't fall from ears while running
Sound quality is 7 on 10 but considering its meant for sports, can't complaint
you cant use in bed while lying flat on back as pressure moves it out from ears
these are in ear not in canal headsets
Happy Shopping
Cheers

got my h'phones in flat 48 hrs. you guys at flipkart continue to amaze. coming to the h'phones, awesome sound transparency n fantastic ergonomics specially suited for gym rats and joggers.extremely light n flexible,it fits in beautifully. however if you want a headphone only for couch listening, then price is slightly steep. it is specially n only suited for the "exercisers" amongst us.

I personally love neckband style headphones. And the PMX 680 will always stay on, no matter how much you workout or run. The sound is very good as the earpiece kind of sticks inside the ear partially. Sennheiser is known for durability, and this one is as light as a feather.
Only drawback is you can't rest your head, as the neckband comes in the way, but that's the problem with all neckbands.