I've flown the Mach 2 (12) now, and I can tell you it's a great kite, but different then the Mach 1.
It's has a good quick steering, but very nice (not tot slow, not too fast -> I prefer the steering of the 12.1 Mach 1, but this kite is a little faster). The bar pressure is low, you can (almost) steer the kite with two fingers haha. It has a great lift, power but also depower. The kite starts faster then last year (under range is great) and you can hold it longer in harder winds.
The use of materials is great by F.One guys so please don't say that it's crap! The F.One guys put all the money in manufacturing! So the materials are really good. I've now the 2002 F.One's and don't have any problems, next year also the F.One's (2003) and I'm sure then it will be better (if the 2002 materials were good, so I think/know the 2003 materials are even good or better)!
Also looking forward to the F.One Dream.