If you use DVD Identifier it lists all the formats and places a green dot next to each one your drive is capable of burning to. You can get it here... http://www.afterdawn.com/software/video_software/dvd_tools/dvd_identifier.cfm Is dual layer worth it? Well, the discs are a whole lot cheaper than they were, but the price still is high enought that I only use them on special occasions. But with the new formats coming out, the price may come down even more, so it's up to you to decide....