I totally agree on these comments except for upwind and jumping details.
I got my REO 6-10 and 12 a month ago (there is also a 4m) and sailed them many times since.By coincidence i had to sail my C4 last weekend and noticed even better the differences.
I think upwind the REO is better then the c4 and jumping feels floaty enough,i did not experience quick dropdown,maybe because i was out in sufficient wind.
The REO definately is the best wavekite out there but makes a great freeride kite as well with more low end then the c4.
If you are mostly in to freeride i would suggest the Cathalyst but the REO will do the same but only faster.Response time is amazingly direct and fast on this kite.
Most fun i had on the 6,waveriding toeside(goofy rider) with 25 kts and small 1.5 m waves, great downwind drift and suuuuuuuper fast!
Thanks for the feedback. I was wondering if Jankie was maybe underpowered and that's why the difference in opinion. I emailed him and he still stands by his review though. I am seeing more and more people claim otherwise.
I will just have to ride for myself before buying I guess. Your feedback keeps this kite as an option.
How ho you find the overlap for your quiver? I'd really prefer a 12m/9m for starters but will probably go 12m/10m and use my 7.5 kahoona for a while longer.