Ive demo the 10'6x30 140L. Im 28 6'3 110kg and surfed SUP for 7 years and also longboards for 15 years.
I absolutely loved how this thing surfed. It surf great in 3-4ft and didnt get caught up once with the nose digging in.
I surfed it as the stock thruster and once on the nose the tail did get quite loose but after awhile you could really have some fun up there spinning the tail out and even turn a little on the nose.
The board was really responsive in the turns and could get really tight round houses in the pocket and even on the smaller 2ft waves you could still get a turn in or even run up the nose.
Being so flat and wide in the nose i did think that the nose would push a lot of water making it harder getting on the waves but it got on the waves really easy even on the late take offs and generated a lot of speed down the line.
As Piros said "You can't help but surf it like a Mal with sole arch bottom turns and drop knee cutbacks"
Just need more 10FT+ divisions around for us bigger guys

Hope this helps with a few of the bigger guys out there and hope to try the 10ft soon.