I've ridden one for about 3 years. It's a fun board and I've been out in some great conditions with a 3.0 sail.
Uphauling requires a change of technique because there's hardly any nose volume but it's not difficult with sails of 5m or less. I have sailed it with up to 7m but the uphauling becomes almost impossible if the wind drops below about 5 knots with a big rig. It turns up into wind before I can get power in the sail.
Having almost no nose gives a better view of the chop ahead mid gybe and makes nose damage less likely during catapults. I also got tracks added to mine.
The downsides are that it's difficult to uphaul in really light winds and chop. Also, now I'm into winging I'd like to try a windfoil board with inboard front straps and centre rear strap.