Depends on what other programs you may have in the PC. Nero 6.6 works well for me with CDs and DVDs. others have had conflicts with Nero.
For beginners, I would suggest that you use AnyDVD and CloneDVD when creating backups of your movies. You can download these at Slysoft.com. Test the full program for 21 days. Excellent support, right here, @ CDF. Experts may want to checkout Shrink (free) or Nero Recode (part of Nero 6.6). Always set the booktype of DVD+R media to DVD-ROM for better compatibility with older DVD players. You can also use DVD-R.
Prior to backing up a movie, download and run ENDITALL (free). This program will shut down all applications running in the background. These programs can interfere with the backup process.