I like the size of this umbrella - it is large enough to walk my child to school with but folds down small enough to be easy to carry or put in a backpack when not in use. It feels solid in the hand and doesn't look like it'll break as other small umbrellas do (although I'm just a couple of weeks into using it.
My only small gripe is the handle. I like that it's a solid handle which feels nice in terms of material but is just a tough short to feel comfortable in my hand and is a touch slippery. Having said that it'd add to the size to make it bigger.
Lastly, I'd love a wrist strap on the actual umbrella (particularly because it is a little slippery). There is one on the cover but not the umbrella itself.