0 STARS-ACTUALLY! VERY BAD!! DO NOT BUY!!!
THIS CD CASE IS VERY BAD!! IT CAN"t FIR ANY CD PLAYERS IN IT!!!!!!!!!!!!!!!!!! I GAVE UP TRYING TO SQUEEZE IT IN WHEN MY BUTTONS POPED OUT!

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Bad fit and Bad design
DO NOT BUY THIS CASE....I repeat DO NOT BUY IT. Get it only if it is free when you buy the CD Player, as it is a terribly designed product, not worth paying $15.
I got my Sony DNF-400 CD Player today along with this case. I have not yet been able to insert the CD Player into it, as it such a tight fit. I gave up after trying to squeeze it, as I did not want to scratch my spanking new CD Player. On top of that the people who designed it, thought that folks would never want to changed the track or adust the volume. It has an opening for the Display, but no opening for the buttons. The volume button is also hidden under the zipper.
What good is a case like this and I am shocked that Sony would make such a thing, it is not like cheap case that I brought from the sidewalk. This is made by the manufacturer of the CD Player and it is not compatible with it's design.

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Worse than I expected
Problems:
1. If you are an obese man, there is a big chance it won't fit you. I am not extremely fat, and I was lucky that at maximum length it fit me.
2. Whoever designed this case was a really stupid person, or has never seen a Sony CD Walkman. The front of the case should have been transparent, at least where the buttons are, so that you can select the tracks in a non-consecutive order, you can switch to radio etc. Instead they left a window for the display, like I would be interested in reading it when I wear the player on my belt.
3. It is a very snug fit, so even if you wanted to take out the player to switch to radio, you cannot do it, or it's not an easy task to do.

Overall, getting this accessory should not influence you, in any way, in choosing Sony or a certain player Amazon has on sale. At least the NF-400 is outstanding...