Tried my new 2017 2XC Simmer 6m yesterday with the Naish WS1 foil and it's a winner.
I've been trying to find the best solution (for me - a lazy pumper) to foil consistently in 10-12 knots of wind on the ocean.
My Ezzy wave-sail is better with the foil than my rotational wave-sails, but the twin-cam Simmer is better again.
The twin cams hold the shape in the sail even with no wind, which helps catching the gusts.
It rigs easily (big mast cut-out) on my constant curve RDM with a fairly tight leech (with min downhaul) - which helps with light-wind efficiency.
The sail is really light and the 1.84m boom length means I can use my lighter wave boom - I reckon a light rig makes a big difference in getting foiling in marginal conditions.
And the sails are well priced