I use ConvertxtoDVD all the time. To get the best out of it take a look at their forum. For instance, the default settings usually produce the best results even though it says medium quality. There are a couple of things though. Change burn speed to about 25% of the speed on the DVD, use only media they recommend such as Verbatim and, unless you have a very fast dual core computer, it is best not to run any other programs.
I find it vastly better than Nero.