I bought these to listen to EDM etc. while out walking/cycling and for that type of music they're ideal. Unfortunately there's a few caveats, you will need a music player with an equaliser or the bass will completely overtake everything and it ends up getting too boomy. They also need burning in for quite a while as they sound awful straight out of the box.
I tried them initially on a Sansa Clip mp3 player with and without a headphone amp and with due to the lack of EQ on the mp3 player they sounded terrible, I then tried them using Poweramp (Android) on my phone and fiddled with the EQ a bit and they sound much, much better.
The sound isolation was good using the largest ear tips and they didn't fall out, they are fairly uncomfortable if worn for extended periods of time though.
A final minor annoyance is the cable sleeve at the headphone end has a large gap between it and the cable so it offers no protection whatsoever.
If you want a decent budget pair of earphones, get the Soundmagic E10's instead, they consistently perform well over all types of music with or without EQ.