I got my brand new Titan 15.5 this friday and had a nice 3 h session on saturday with it. This kite truly and utterly ROCKS!
Since the wind was blowing from the "wrong" direction I had to boat-launch. It worked perfectly and without a hitch.
The wind was quite gusty and bounced between 1 m/s to about 7 m/s.
Most of the time it stayed at 4-5 m/s though.
I could stay up wind from about 3 m/s without problems and got really nice power from 4-5 m/s.
The kite turns *really* fast, especially if you consider the size of that thing. The barpressure is quite low, both with the depower and when you turn it.
BTW, just as an example of how fast this kite turns I can tell you that it is very easy to loop the kite even in light wind (even if you don't stall the kite in the turn). If you apply a lot of power when you turn the kite it sort of stops and make a 180 around its own centre-axis. Looks really cool!
As a comparison a friend of mine was out on his Cabrinha BT 17 -03 and couldn't keep from slipping downwind constantly due to the light wind.
So there is definetly a lot more grunt in the Titan 15.5.
The only thing I couldn't properly test was to jump with it, I tried three or four times but since I had no leash and got really tired of bodydragging after my first major wipeout (20 minutes of bodydragging before I found the board). However I think you can get good height and really nice hangtime with this one. I got one jump that was approx 2-3 meters high in about 5 m/s, I don't know if it was due to a gust or not but it felt quite good.
As for water-restart and such it actually worked exactly as good as in the film you can download from Flysurfer.de... even with this big kite.
Some more facts about me/conditions:
* Skill: Intermediate
* Weight: about 77 kg.
* Board: Cabrinha Vari Pro 138 cm.
* Spot: Ekoln in Uppsala, Sweden (sweetwater).
Other kites I've used (with at least 2 hours on them):
Naish Aero 12, Aero II 12, X3 16.
Flysurfer Psycho 6.5, 9.5, 12.5, Titan 9.5 and 15.5.
My "standard" quiver now consists of Naish X3 16, Aero II 12 and Flysurfer Psycho 6.5, 12.5, Titan 9.5, 15.5. So there is quite a lot of overlap windrange-wise. :-)
I also have used a Naish TT 5'3" a lot before I got my Cabrinha Martin Vari Pro 138 board.