Thanks to those who've offered input to others on dual layer back up issues with regards to layer breaks. I've had my plextor 716 for about 3 months but at 3-4 bucks a piece, I was worried about making some pricey coasters.
Anyways, I've done my research, read plenty of posts around here and gathered up the nerve to try a dual layer back up. I needed to make a copy of The Village because my 20 month old daughter has decided to make the original a chew toy. So I grabbed some Verbatim DVD+R DL media, down loaded Imgburn and boom. With DVD Decryptor as my ripper, I was succesful with my first attempt at duplicating an entire DVD.
Thanks for the tips and tricks!