I must say, I love this MP3 player! It is a huge upgrade over another I had, which had a much smaller data capacity, and no access to the radio as this one has, and definitely a shorter battery life. It also stays clipped on nice and tight!
I always use this at work, and it lasts throughout my 8+ hour shifts, and I've never had any problems with it (until recently, more on that later). The previous one I had wouldn't even last the whole shift, so I had to be careful when I used it, and it seemed to use up battery power when skipping songs! The Clip Jam here sure doesn't do that though, so that's a plus!
This has an auto power down mode if you have your music paused for too long, which is also nice, as it saves battery power. Not that I was ever close to reaching the 18 hour limit. You can turn off this feature in the settings if it is not to your liking.
I DID have one problem with the player recently. One day when going out, I kept the MP3 player in my jean pocket. I didn't use it that day, but when I got home, I saw the screen was frozen on the "Music" icon. I could power the player down, but it wouldn't fix the problem. The only thing I could seem to do was listen to the radio, which was still good! After looking up some information online, I found a link in the player's manual that sends you to a page where you can download a firmware update for the player. This fixed my problem, and it was a simple drag and drop installation and disconnecting the player afterwards to allow it to update.
I definitely recommend this and the price is great to boot!