I just got my first dual disc cd/dvd combo and it is definately thicker than standard CDs or DVDs. It plays fine in my tray loading DVD player on both sides, but I am a little nervous about putting into my iMac and not being able to get it out. Anyone else buy and use a dual disc? I think it is a pretty good concept though. They got me to spend the extra 4 dollar premium they charge over the standard CD.