There are two of them at Perth, and I have had the opportunity to get a close look at them. I also have seen them flown, and displayed. Now..
Great workmanship, from a distance they look great, and I am sure the guys that have them have some good fun. Do I think they are worth a 100k investment? No. I would rather have a YAK50. In the air they sound odd, because you see the famous outline, but no sound. That is a disappointment. I also, like any single seat aeroplane, would find it all a bit pointless, unless, you had some real power, and could do something with it. My point of view..
I also understood, and it was a comment from someone else, that they required an inordinate amount of maintence, relative to its mission profile, but that may have been sour grapes, and no doubt someone who owns one could confirm.