I've talked to the designer of this sail for quite some time. The thing ends up being a cross between a code 0 and a free-flying genoa. I think the concept is pretty solid for off-the-wind sailing.
Because of its girth measurements it rates as a head-sail. If you get the 150% version it is likely that you can use it in PHRF racing without a change to your rating. I'm also guessing that most JAM fleets would have to allow it for downwind use (because its not a spinnaker), until the following year where they would close that loophole! ;^)
Sure. Some days you just want to move. In any direction. And being free flying, you can ease the halyard a foot or so to help the sail rotate to windward. Due to the straight luff it will not do that as well as an asym, but enough to be effective when sailing deep.Would you consider one if you had a budget and since it looks like it is half the price of a spinnaker? I like the idea of it for our terrible light wind days, been playing with the hanked on reacher I have with the boat but this might be more fun and obviously better shape then a 30+ year old sail.