looks good, but does it really surf any more radically then a normal 7"10-8"5 surf SUP???
What you gain on small or hollow waves is being able to drive the turns by the front foot like a shortboard: on a 8' SUP, you need to lift the nose in the turn in order not to catch the wave face (if you have a wave face less than, say, 10 ft), but this way you kind of apply the brakes (stall). By using a SUP short enough to "fit" in the wave face, you can apply full front foot power during the turn and build insane speeds through turns. Once you experience this, looking at people doing "radical" turns on a 9' but losing their speed will make you cringe. Also, longer SUPs tend to bog down if you apply power in the front foot, by having too much wetted surface
This explains why shapers who have big wave faces (Hawaii) do not feel the need to go shorter: the wave face is big enough to have room to properly commit a 9' into the turns. But this morning I saw a friend using his new 7'2" and the progress in his surfing was unbeleivable: I never saw him with such speed and fluidity
And, moreover, the more compact shape means that the board feels "glued to your feet", an extension of your body, very pleasant in turns.
So, in my experience, it is not just "a 8' turns better than a 9', which turns bettter than a 10', ...". There is a threshold, which depends on the wave "usable" face size, where the board "fits" and you can keep power in turns by committing on your front foot, like on a shortboard.
bet the rails cop a hiding 
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