Love these sandals. My son wore them all summer - they are comfy, very flexible, protect the toes well, don't make the feet stink like synthetic sandals.
The things that need improvements:
VELCRO NEEDS TO BE MORE DURABLE AND HAVE BETTER STITCHING. Velcro started to unravel after a couple days of wear. I melted loose threads with a lighther. That helped. However, the soft nappy part of Velcro lost its grip after about a month and my son's sandals would come undone all the time. The sandals themselves were still very good and my son loved wearing them, so I took off the old soft velcro part and stitched a new one on myself (you will have to have some sewing skills). I fixed it and he wore them for another 3 months until his foot grew out of them. Now my nephew has them and they are still ok to wear.
THAT BEING SAID, I loved the sandals enough to buy a new pair in a bigger size for coming up summer (velcro quality is unchanged, so I melted the edges before letting my son wear them snd we'll see how long the velcro will last this time around). Size up, they run about 1/2 size small.