The donut shop in downtown SD has a similar one. Its good, but I wouldn't go out of my way to eat it. But, the Kouign Amman (they are called DKA at the Cronut guy's shop) is amazing. My wife and I made some a couple of weeks ago and were pretty good, but obviously not as good as his. Its basically a croissant, but in between the layers is sugar, then when it is baked it caramelizes. Its way better than the imitation Cronuts I've had.
[video=youtube;2zu7F20Yflk]