Have any one in CS used/tried out the Macro Reverse Adapter for Canon EOS (58mm) Model: 21015. or any such similar products

Is this really worth buying? i mean do we get good image quality and good
macro shots....

Product Link : http://store.tagotech.com/product_in...products_id=62

Is this product worth than the Macro extension tube of Canon.

pls give ur views..