I use these with my iPod to commute every day to work, by bus and tube. The bass is great, full and rich, this is my favorite part. The overall sound of the headphones is pretty powerful as well, nice clean punch sound. The background noise is drowned out pretty well, great physical noise abatement (the way the earphones fit is top notch). But these are by no means as good at drowning out background noise as my Bose quiet comforts, but for 1/10th the price the Sennheisers do a great job. Nice cord length, and a neat little gadget on the cord to wrap up part of the cord if it's too long (like if you're exercising). I've tried both these and the similar Sony model, and while I've been happy with both, the sound from these is just a little more intense.