I've tried the 5'10, light version without inserts. So light, that's scary
I did't want to give it back and ride mine...
After this test, I've decided to get the 6'0 (i'm 85kg). Reinforced version, around 3kg, so still very light but definitely stronger than the light version.
Those boards are by far the best I've tried and I've tested a bunch of. Quick, confortable, flexible, snappy. If you have the occasion, test them. The 6'0 has more volume and is fone for me, but I could have selected the 5'10 as the shape is brilliant and offer the necessary buoyancy.