Having now had a chance to use the sail here are my thoughts.
Construction wise the sail is very well built and looks stunning out of the bag and sets with a nice deep shape and loose leach when rigged to spec.
The recommended mast is a 400 but I opted for the 430 thinking it would be better for my heavier weight, took it out for a blast in 8m weather(gusts 18knts), picked up a few gusts and managed to get a few planning runs, the sail felt great and had plenty acceleration off the wind, these sails do produce a lot of downforce and I had to run my boom higher than on my EVO's to get everything to free up but once all tuned felt nice and balanced.
The 430 mast did feel stiff and can now see why it was designed around the 400rdm, I managed to get the mast to bend off with aggressive pumping but may be fine in stronger winds only time will tell.