This would work if one only uses the player at bedtime. Otherwise, everytime you turned the player on it would power off at the preset time interval. Hence the need to manually set it to do this when you want it to.
Sorry, the “once/always” would be a perfect solution, but the option doesn’t exists so as things stand there is no real solution until they do a firmware update including this option.
The sleep function is designed to reset to OFF if the device is manually powered off before the set interval. This was chosen to avoid confusion when powering up again. Just imagine how inconvenient it would be to have the device turn off every 30 minutes.
On the other hand, having the device remember the last interval selected by placing the pointer at that last time doesn’t sound like bad idea, I agree. The result would be very similar to the one we see when selecting EQ , where the last selection is retained.
My creative zen had this feature.
You set a particular interval ONCE and it automatically turns off after X minutes starting from when you touched any button = you’re sleeping