I'm not a tech geek, but I have one of these (smaller size). I use it for running once a week. I like it since it has FM also. It has a strap on the arm. You have to print the full manual from the CD to get the full use of the mp3. The buttons are a little confusing (to me) and takes time to adjust to its function (or I am just dense!). At the same time, I don't know how does this one differ from other mp3s. I think if you are looking for something cheap that'll do the job, the Sandisk 512 will do. And I paid about the same for 256...