I'm no pro that's for sure.
I have had to ride this kite a few times now to work out what it is, racking my brain to come up with the reason it fly's so differnet then any other kite I have had a crack at. Also I had to adjust to the kite's attitude so it was really about my attitude..
I have thought about this for some time.

It flies from the front lines. So when sheeting you trim out not in, when you get the strap tweaked up right for the day. If you pull the bar in you can depower it, I really like this.

When you jump on this kite it goes up up up and fark does it glide.
Also when jumping this kite I like to scream "lock it in eddie".
It must be the shape of the leading edge. I can afford to learn tricks I would not have gone near all because of the shape. It will glide along when I am jerking around like a spastic. it just stays in the correct position. This kite has some hidden powers!

It can go fast really fast. It's like it is whispering to you "we can go faster come on lets do this we can do this". then pull in on the bar, "whoomfp" up and up you go. Or "Crk" As most of you know that is the noise the water makes when you stop really fast from edging in hard and stop fast, It's all upto you.

This kite goes up wind so easy, I feel better then the crossbow 3
I have great things to say about this kite but its looking like 2many words on this page so I am going to stop."Crk".

Flew the 12 today, I only did two runs cause it wasn't my kite so not very thorough. It fly's like a kite, nothing special. Feels a tad "different" (NOTE: Not better or worse"). Pretty grunty I thought, had more power than my 12 that I put up straight after and I would consider it to be one of the gruntiest kites out. So gets my approval in low end. Top end seemed a bit uncontrolable, not real good for unhooked. It would take getting used to.

Also a quick note I told the rider that I thought his stock standard naish freestyle leash would snap, 1st run it does ad I had to drag him all the way in.

So overall a pretty good kite but DEFINATELY not something to get excited about like the hype suggests. Lots of people will like it but definately give it a go because in my books I didn't really do anything special that made me go wow I want to fly a Sigma. I probably need to fly it for longer to give a better opinion.

Feel free to flame me or ask me some questions...