Different to ride: points upwind all the time when you first start riding them, nosedives, kind of slow to plane, grabs at wake and initially a nightmare to gybe. They are technical to get 100% out of, and that is part of the challenge of owning one, if you want a board you can just hop in the straps and cruise DO NOT GET ONE.
But they are the fastest 75cm+ wide board (I am regularly seeing over 30 knots in choppy conditions), they carry the speed to all points of sail and have a huge wind/sail range- pretty much the biggest of any board available (I cant see myself parting with mine anytime soon since there is no one board i can use for racing which will replace it).
I have used mine with a 9m down to 5.4m and it handled all of these sails beautifully, fins 52cm-32cm. They can and I have seen them used with 9.8m's and I would say 5m is definately their lower limit. The key to getting them planing is moving back quicker than normal boards and always rig big and have enough sail to pull the board on the plane. By doing this I can use it in 10 knots (90kg)and yes padi I know it planes slow with my 6.7m SPEED SAIL

. Dont really look at the volume as the have alot of virtual volume- feels at least 120L, the only time i've noticed it is sailing in light winds on fresh water.
I love the wood construction, excellent ding resistance- I hate starboard's fin boxes. I have size 11 feet and have some problems with front foot catching the chop at times, I wish it had another set of holes in a little but I'm working around this (DRAM versions and I think the 105's have the extra holes). Biggest wind I've had it in is 30 knots, handled it fine... they do start to get a bit flighty. The catching the wake thing is something you sort of get used to and muscle the board through it. One other thing that makes them challenging is they have alot of fore-aft trim adjustment, but getting it right is half the fun.
Yes other boards can and do work better in their respective conditions but for 1 performance board to do it all hypersonic is king. Be prepared to give it time... they will reward you in the end.