Liquidity is great. About 80,000 contracts per day. Each point is worth 25 Euro. 1 contract on DAX index is worth about 100,000 Euro. Volatility is similar to SP500 Emini futures. Minimal price tick is 0.5 point. I don't know how big spreads are.
You can get DAX futures quotes and charts from esignal. Plus $22 Eurex fee.
With IB, commissions on DAX fut. are 3.95 EUR per 1 contract. Initial deposit - 10,000 EUR.
I'm not trading DAX futures yet, but I've observe them for a couple of weeks.
DT-waw