I say that is not 100% accurate and here is why - the tray on some DVD drive models is not in exactly the same place as it is on the original one. You are right that the drives will work in terms of the OS recognising and controlling them, but physically there are problems. I have tried two different drives (Lite-on and philips) but neither of them open properly. They start to open and then get stuck because the tray is not correctly aligned with the slot aperture. If you can put up with having to grab the tray and pull it out, and push it back in again after you have put a disc in then I suppose most drives will work. It would be great to find one which fits exactly so I can get that nice smooth action when it opens and closes
Cheers
Bob