They're really great for us because we are a "no outdoor shoes inside" household - not just because it's my Japanese husband's culture, but also because it is SO MUCH HEALTHIER - think of all the nasty things you can track in from outside in your shoes. No thanks!!
My son is too young to understand about the split-toes being healthy for his foot development, but he does understand that they look VERY different from anything he's ever had on his foot, and he's in love with them. The first time he put them on, he looked at me and said, "ROARRRRRRRR, I'm a T-Rex!!!!" and I couldn't contain my laughter. Yes, I guess they do look a bit like a dinosaur foot (or goat, pig, etc).
They're incredibly lightweight; not as flexible as I'd hoped but decent. I should add we're coming out of only wearing baby moccs until now, so the jump into sneakers is always a tough one. But I gotta say, they were literally off and running within seconds of strapping these on! Nothing stopping these girls!!