It looks like a good value purchase, but I don't like the closure at all. It looks like it would pop open and/or get loose very quickly.
That's one of the nice things. The closure is a two piece post that screws through the leather. You can just remove it by unscrewing it and replace it with any kind of closure set up you want.

Is it as easy to open and close as it looks?
Yes, it is. That's one of the things I intend to watch. Will the leather stretch, and allow the sporran to pop open on it's own? Only time and wear will tell.