I have Nero 9. Mainly, I use it for Audio CD burning, as I have a recording studio, and there are no problems. I don't use the Nero backitup as I use Acronis True Image for backups.
Nero has got "bloated" over the years but is heads better than the buggy Roxio. I used Roxio for a long time (started when they were called Adaptec) but had so many problems with each version that I finally gave up. I have problems with an old version (8) of Roxio on a Vista PC and it looks like it's going to take a manual uninstall, including manually editing the registry, to get rid of it as it won't uninstall with uninstall programs.