What momentom said, I's second all of that. I prefer to trade it in the am when it is doing its own thing. Sometimes in the pm it diverges a bit from the US but depending on your timeframe it tends to get yanked around by the US indexes.
Dax is 12.5 euro a tick and there are two ticks to a point. I have seen it move 20 points in a heartbeat. Volatility can go to the other extreme also. So basicaly it is a high value, extreme moving market so lots of oportunity but of course more potential risk also. You dont realy get a feel for the speed it can take off at unless you are waching it live. I would say its ER2 on steroids.
Sometimes despite the volatilty it moves with breathtaking 'order' other times it looks like someone has thrown a handful of random bars at the chart. (Dosen't everythig?).
I think an experienced trader could do very well once they learnt its character.
Cheers,
Nick.