Be sure and read their return policy carefully! The "free" shipping is NOT really free if you need to return something, as you will have to pay the cost to ship the product back AS WELL AS reimburse matsmatsmats for their cost of the "free" shipping to you. It is NOT cost effective to return ANYTHING, as a result. For example: bought a product for $64.99 that included "free" shipping. Product did not work for my situation and the credit to me upon return was $28.99. The cost to ship the product back was $36, so my "out of pocket" expense was $100.99 ($64.99 plus return shipping cost of $36). For a total of $100.99, I would receive a credit back to my card totaling $28.99. Nope. Not cost effective at all. Cannot recommend using this sight unless you are absolutely 100% certain the product you are ordering will work and there is zero chance it will need to be returned. Because then "Free" is NOT so free...
Very pleasant customer service repress and fast delivery of the product, but if it does not work out, sell it on ebay or give it to a friend. You will come out ahead...