I own a Creative Zen V 4gb. It is amazing. I have had it for probably 2 months now and it has never froze yet. It is about half the size of a nano and twice as thick. It is well made and extremely scratch resistant. It has a oled display that does not use a backlight and is supposed to be pretty efficient. They are not good in bright sunlight because the screen is not that bright. The colors are pretty decent on it as well. The joystick control is easy to use for me, but if you have fat thumbs then it might be harder. The only part I don't like about it is that it cannot be mounted as just a MSC device (like a pen drive). You must use Microsoft's propriety **** proctal MTP. It was a deal (imo) at $150.
Sorry for the condensed paragraph with rambling, but I am in a rush and wanted to do a quick review on the player.