It's happened to you. I know it has. You've just finished watching your favorite movie on DVD, then press the eject button on your DVD player. Nothing happens. You press again. And again. And again.
On a older Toshiba Laptop, the CD tray won't stay closed. It is open a inch. When I try to push it closed, it just springs open again. There is no 'click' when it normally would ;latch. This just ...
Buy a slot one, I always worry that some day I will do something stupid and break the tray off my CD-ROM. But internally, they're the same, so go with your preference.