The headphones for my Spark Cardio + Music arrived within a week, so was very impressed! However, I am finding them extremely uncomfortable to wear. The problem for me is the in-ear ear buds. My other headphones which I wear all the time for my phone, mp3 etc are in-ear but the earpiece doesn't go in to the ear canal, they have the little foam pads on them and are very comfortable. The problem with these ear buds is that I just can't get them in my ears, even the small ones. I don't know if my ear canals are particularly small, but it really hurt and I had to stop as it was really making my ears sore. I've tried opening my jaw, lifting the ear etc. I just wondered if I am doing something wrong as I have not used this type of earbud before and if anyone has any tips?