I wouldn't say it is revolutionary, because the Hong and the AoChuang can definitely give good competition, but I agree that we need a thread for this. It is definitely one of the best 5x5's ever released. It is GAN, so it is expensive, but if you want the best of the best, I would recommend people to give it a try. If there is a thread about the Hong, I see no reason why we shouldn't have one for the GAN. (However, this thread is in General Discussion, so once people try it and can give their opinion on it this should be moved to puzzle reviews.)