Upon receiving this umbrella the first thing I noticed is that there were many loose threads. What that tells me is that the product will not last long and will probably start to leak in the near future.
The hilt is made out of a decent plastic. It feels cheap, but is sturdy enough and looks good from a distance. I feel that the hilt is too long. The hilt-to-umbrella ratio is off making it look a bit awkward in person.
The open release button is not on the hilt. That means you have to reach over the big hand guard to open the umbrella which isn't that big of a deal.
The opening mechanic feels nice and has a satisfying feel when you open it.
It comes with a little fabric sheath that you can put the umbrella in and carry on your back. I do not recommend using it as it is too snug for the umbrella and it appears that repeatedly putting in and taking out the sword would wear down the poorly put together fabric on the umbrella.
One thing you need to decide before you buy is whether or not you are confident enough to carry around this umbrella as it feels somewhat like a toy.
That said, it's a neat idea and I can't wait to test it out.