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5v Step Up question

http://goo.gl/TLX3B

 

Does anyone have experience with this type/brand of step up 5v converter? I'm comparing it to the Pololu one here: http://www.pololu.com/catalog/product/798 which is slightly more expensive, and then you get hit with shipping costs (for me it's about the same price as buying a second module).

 

Comparison:

Pololu 5v step up ($5.45 + SHIPPING)