When you hold an ordinary umbrella handle, the weight of the umbrella is centered above your hand. When you hold this C-shaped handle, the weight of the umbrella is off-center by just an inch or two -- just enough to make it very uncomfortable to hold. I think you're supposed to be able to put your hand through it so that it stays up while supported by your wrist or upper arm, but it's too small for that to work on me -- and I have very small hands and wrists.
Because it's inside-out, when it's folded it doesn't drip, which is very nice. But because it's inside-out, when it's folded it doesn't dry, and you have to remember to open it to let it dry.
The double layer is very helpful for wind protection, and I like having a plain outside and a decorated inside.