I love gymboree clothes for my son since he's only 2.  They're very cute and great for a little boy because they offer designs other than sports.  So, on that end, I would say selection, design, and cuteness are all there.  I do think their toddler clothes are a bit pricey, though.  I have actually started to shop at their sister company - Crazy 8 - because the clothes are very similar to Gymboree, but at a lower price point.

I definitely recommend their clothes, but make sure you shop there during their big sales.