I am a first time user but I have been helped by many forums over the years.
I have backed up a DVD using ripit4me, DVD Dycrypter and DVD Shrink as the DVD is copy protected. It works perfectly on my computer but won't work on any DVD players that I have access to. I have used +R and +RW DVD's. I don't have any problems using just DVD Shrink with unprotected DVD's.