The image below is just one example of their rather beautifully done demonstrations. The animation is partially overdone IMHO, best steer via the sitemap bottom left. Nothing totally new there, but stylishly executed. Correction: one thing was new to me, namely that amodal completion (Kanizsa type figures) enlarge the enclosed space – hmm, I'll have think more about that.

The image below shows one of their versions of the Ebbinghaus illusion, and I note that  – somewhat akin to the Delboeuf on my site  michaelbach.de/ot/cog_Delboeuf/  – replacing the usual diagrams of geometric illusions by real-world images renders them stronger for me. 

Anyway, enjoy Mind Lab if you like that sort of thing!