I have owned this product for 2 months so I will try and update it after a year of using it.
This is an Australian made product if that matters to you, can't confirm where the materials are sourced from but the built quality seems pretty nice.
The edges are not sharp and dangerous to me and...
Owned it for a month now.
Works reasonably well at retaining water, I haven't noticed any damage. It's easy to clean but changing water every few days, I've noticed there's no algae growing inside the ball tank.
The handle is reasonably stiff for it's size to hang securely but I haven't a need...