My experience. I'm fanatic North Loyalist, only brand of LEI I've ever owned since 2002. I've been on Rebels since they were introduced in 2007, now on my 4th set (2015 Rebel 10 and 14). I'm 100kg and use the Rebel 14 in 7 to 10 knots, Rebel 10 in 10 to 16 knots, Fuse 7 above that. Rebels are good kites, my observations:
- I can dive both Rebels with a good single dive surge that pops me straight up on foil, even in water which is shallower than the mast length
- build quality is based more around durability than lightweight. you can foil once you get going in much lighter wind than the Rebel 14 needs to stay in the air. Prepare for the hindenburg.
- 5th line is a good safety system, but I have had more self rescues in the 18 months I've been foiling than in the 13 years before that combined. As starsky said, rolling through the lines in light and flaky winds is a very real possibility. Trust Me. I am totally done with 5 line systems for foiling and will go to North 4 line kite (probably Neo).
I love Rebels, great kite, but it would not be my first choice for light wind foiling. Steady wind foiling on the 10m Rebel is beautiful.