Yup - had a Flexfoil Rage 3.5 I used for kite boarding and general mucking about.
I also bought a Flexifoil Blade IV 4.9m and it broke both my ankles on it's third outing.
Great fun - until they spank your ***!
I've also got a Flexifoil blade IV 4.9m and though it's challenging to fly and easily picks me up (I'm ~120kg) my little stacker 6 is more fun to fly as it's not constantly trying to injure me. It's great fun to fly in very strong winds too though I've broken a few lines.