I tried mine with Sizzix Simple Impressions brass embossing plates and got a pretty good image. I don't own a Sizzix, but they had a sale on the folders recently and I got a bunch of them really cheap.
I did have to cut a piece of thin cardboard (from a cereal box) to use with it.
The best impressions, though, I think, are using the Cuttlebug folders.
Bugga in OK
"Be kind whenever possible. It is always possible." Dalai Lama