Has anyone used the the Silicone 3D Contoured Rose Petal Veiner by ck?

I am thinking of buying this, but am not sure how it works. If you have used it would you please let me know if it is helpful.

http://www.intotheoven.com/Gumpaste-Veiners/c73_124/p2300/Silicone-3D-Contoured-Rose-Petal-Veiner/product_info.html

i have one similar to that, i don't think its necessary. Personally i would opt for the leaf veiner, i think you would get more use out of it.