My 3.5 month old loves looking at this mirror. He can have squealing conversations with it for a half-hour at a time (which is great for letting me get stuff done), and he's more accepting of tummy time if he can have this to look at. Yes, it's a little distorted at the edges, but it's not like the baby cares. The 4 stars is because it can't really easily be hung in the crib without being right in the baby's face (at least if baby is on a high mattress setting). However we have it hanging from an arch thing over his crib and it works great. One of my top favorite baby toys thus far.