I love these earphones - they are comfortable for my small ears (with the smallest attachment)and never fall out. The sound quality is great - I used daily with my ipod walking next to a busy dual carriageway but didn't need to have the volume anywhere near maximum to hear and sufficiently drown out traffic noise.
2 down sides:
1) over the winter, I started to notice that if there was cold or moisture in the air (ie: mostly when it snowed)I found I was getting tiny electric shocks from them! Not 'painful', but like a static electric crackle in my ear every now and then which wasn't exactly enjoyable!
2) having used them for every day for 6 months walking to and from work and in the inbetween periods they've been wrapped round my ipod in my handbag, one of the ears has become very temperamental, needing a good wiggle or sometimes holding in place at the jack point to get sound in both ears. This is probably as a result of the way I store them wrapped around my iPod, but I knew I was on borrowed time.
I've just replaced them with some Panasonic RP-HJE120Es in the hope they'll be a bit more durable. I haven't tested them out to compare sound quality yet, but comfort-wise, I don't like my new ones as much as these Creative ones so would be tempted to go with these again in the future but just treat them with a little more care.