EverEdge Steel Lawn Edging 4" Slate

I have a area of the backyard I want to mulch but it is a has a greatly rise of a few inches in the yard. Does this do ok on uneven ground?

My soil is clay that is a real bugger to dig. Can this edging be installed successfully in clay?

I need to seperate lawn (Kentucky Blue grass) from flower beds - what height should I get?

why aren't prices in pounds and pence.