I haven't had any problems with Nero. I don't use it all that much either tho, which helps :P

I use DVD Decrypter for all my ISO creating DVD burning needs... I only use Nero when I have some files to burn to to a cd - compilation style. I even think the Windows standard burning features can do almost the same job, even tho it's not the fastest way around

All in all, it's not that I don't like Nero, but I find that there are other options that work just as well, if not better.