I can't comment on the Stokr wing board specifically, however I recently bought a demo Stokr DW board 7'6" x 19 1/2 @ 115 litres and was eyeing off the 6' wing board that was on here (must have sold - bummer)
I love it!
Im using the DW board for all my winging, this weekend was out in sub 8knots, 2 weeks ago out in 25knots.
Solid construction, fast through the water, ribbed deck grip is awesome with small gaps between the sheets so you can reference your feet position by feel or a quick visual.