For the most part I do like the slot load drive on my PowerBook, but it does have some disadvantages. It can't take non-standard discs (business card, mini, etc) like a tray loader can. Also, I've noticed that discs that I use in the slot loader drive a lot get scratched a little bit from going in and out. Presumably it's from the disc scraping the bottom of the slot accidentally when I insert the disc. Even little scratches on my CDs and DVDs bug me, and in fact, none of them are scratched except for the (relatively few) that I've used in my PowerBook.