Spent a couple of weeks with the my new Hot Sails Maui GP2 6.6 on Isonic 110 (2010) and (close to self-distruct) Carbon Art 58 in a variety of conditions, from pre-planing (gasp!) to overpowered. For comparison I used GPS 6.6-7.3 (2009) and 8.0 (2011). It is rigged on a HSM RDM Hot rod 430 (might upgrade to the HSM Ultra), but it comes with two sets of cams and can be rigged on SDM.
The good:- Rigging is easy, down haul to 4-6 cm from final tension, add some tension on the out haul, pop in the two cams, finish down haul, done.
- Sail feels very light. In pre-planing conditions it is surprisingly easy to handle. Tacking is as comfortable as with a rotational, with an easy cam rotation that actually helps the tack. You can play with this sail
- It seems to be very tolerant to fine tuning. There is a sweet spot for a given condition, but the sail works well in a variety of settings
- It has a beautiful pull, very neutral without any jerking around. The day I did my max speed (33 knots in a choppy location with people powered up on 4.7), I was very impressed by how easy and effortless the sail was: literally disappearing in my hands. Way more comfortable than a overpowered wave sail (or a speed demon of old)
- Top gear downwind is lovely, in a gust you feel the sail open up and the board just accelerates forward. Very smooth
- Upwind, especially with the Isonic, is very impressive, pulls like a train at an good angle. (The sail is small for the IS-110, but it has very forward/downward pull that seem to work well with it.)
- Powered up sailing (as opposed to overpowered) is easy, it is a cruising sail
- Jibes when overpowered, at top speed, happen fast and using a rather aggressive lay down is a good idea unless you want to get back winded and ... well you fall in but guess what: the sail sleeve does not retain any water and you are off again in a blink
- Did I mentioned this already? It is very very very very stable.

Some peeves: the top cam: I would have preferred a pocket with a zipper .. current version looks a bit like an open cam of ages ago ... according to HSM this is done to increase the range of possible boom positions (for very tall people).
The so soAs I mentioned while sailing the weight is irrelevant, the sail feels light and under power it simply disappears in your hands. But ... it is 5.15 Kg on a digital scale out of the box and you feel it on the beach (or maybe I am spoiled by my weightless Firelights). It is around the real weight of similar twin/seven battens but every detail in the sail seems a bit overbuilt and even carrying some extra weight, from the logo at the foot to the sail, all the way to the mast sleeve in OX webbing ... as a result it is probably bulletproof. Not a big one but it would be nice to see half a Kg shaved off. The two cams, by the way, are just 125 grams.
And ... a great sail! Easy, powerful, fast. A twin cam that is as easy as a rotational but more stable and rangy. Great choice, at my weight (72Kg), for 15 to 20 knots in the rough seas of the San Francisco Bay area. A 7.3 might be next in line although my current 6.6 to 8.0 GPS gap works nicely.