Having purchased this already from amazon, I have to say this season is the best yet and I'm sure every DBZ fan will agree.
The season starts off with Cell announcing his Cell Games and there are a few eps with our fave characters relaxing a bit before the fighting begins.
And when the Games begin its one of the best moments of DBZ with Gohan's epic battle against Cell! Plus its remastered and you can choose to have the Japanese or original American music (I greatly prefer the latter) and some extra dialogue included (especially with Gohan).
There should be no reason not to get Season Six of the hugely popular anime DBZ.