I got to ride my 2015 Cab SB 12m yesterday in 18-20 knots of wind for a couple of hours. I checked my lines today and they hadn't stretched at all so I think that the lines came poorly adjusted from the factory. Like I posted earlier, after about half an hour of flying this kite in 9 or so knots and having it backstall occasionally I checked the line lengths and the inner lines were an inch too long. I adjusted the lines after that first session using the line connectors on the inner lines. Even after a couple of hours yesterday in about the most wind I would fly this kite, the lines were fine with no stretch.
Based on a couple of the comments in this thread I went back and checked the bar on my 2013 9m SB (which uses the same lines) and the lines were perfectly even. I remember when I got the 9m I tuned the lines once after my first couple of sessions, but they have been fine ever since.
As for the kite, I have had SB's in 2006, 2008, 2010, 2012 and 2013. The 2015 is a great version of the kite. The bar pressure is low to medium, I could fly that kite forever and not have any issues. I am coming off a 2012 Airush Lithium and the 2015 SB's bar pressure is far lighter than my Lithium. It doesn't turn quite as fast as the Lithium but it isn't far off, and the high end is much, much better. I would never personally have flown my 12m Lithium in 18-20 knots, it was no fun at all in those winds. I was on my Monk Forever because the wind was too strong for the surf board I had with me, but riding down the waves at Sandbanks in almost onshore conditions the kite drifted really, really nicely and I could stay on the waves. I'm sure the wave purists will say that it isn't a surf kite, and it isn't really, but I think it will work really nicely for guys like me who want to ride waves some days and have fun on their twin tip other days.
I have nothing to do with Cabrinha or any shops and have ridden lots of stuff over the last 10 years. I think the kite construction this year is the best I have ever seen on a kite, and the bar is really nice too. Cab didn't invent their new safety system but their version is pretty slick. I don't think the lines are poor quality as others have suggested, but I do think they should have come properly adjusted out of the factory.
I would highly recommend this kite, I would say the range on the 12m is just about 10 knots with a big surf board to 20 knots.