"About slow boot"3.5 starson
Pros: The problem lies with being a hard disk player. You need to defrag the drive once you've got a lot of data on it. I recommend Perfectdisk from Raxco which can defrag system files that other defrag tools can't. This will greatly speed up the boot time.
Cons: Still needs a proper gapless playback mode, shuffle and on-the-fly playlists. Rockbox are working on a freeware modded firmware that should create a much better player.