As someone who grew up watching Dragonball Z religously on Toonami, I've been buying these boxsets obsessively. As is often pointed out, despite it saying the DVDs are region 1, they are in fact multi-regional and will work on any UK DVD player. Plus they're uncut and feature the original Japanese dialogue and music (although personally I prefer the English voices and Bruce Falconer's music - but that's just me :P)
This season is not as great as some of the others - it can drag a little. Androids drive around a bit more in their hardcore pink van, Cell comes, people panic and yell "Goku we need you!", Vegeta ruins everything with his ego, Trunks has some long flashbacks and that's about it in a nutshell. That's not to say it's not good, it is, but it does leave a little more to be desired - this may also be due in part to the fact that it's a LOT shorter than the other seasons and ends pretty suddenly. There's still six discs, but to make this shorter season fit onto six so it's in keeping with the rest of the boxsets, most of them only have three episodes apiece, so they're just under an hour long each - leaving you sitting there thinking "It's over already?"
If you're a Dragonball Z fan buying up all the boxsets like me, obviously you'll still love this - just be prepared to want to buy the next boxset almost immedietly as this one is too short. I'm wishing I bought them both at once, so I don't have to wait for the next one to be delivered. Cell Games, whoo! :D