Ordered this after receiving a free repair by Apple Genius Bar to protect the new bottom casings. (Whilst my machine was out of warranty the cracking I experienced was commonly attributed to a design flaw and thus was dealt with quickly and easily by Apple.)
Whilst the quality of this product cannot be called into question - the Marware original packaging is poor, as over time it puts stress on the protection pad in two prominent places (where the product is curled around the packaging) causing minute fissures in the product. I am concerned that this will cause uneven or accelerated wear however only time will tell!
Due to the age of the 13" Black MacBook the protection pack is unlikely to still be under manufacture, and thus any product is likely to be stockpiled, sat in the packaging and straining due to the design.
I complained to my seller and quickly received a second product with the same issue.
With this in mind, the product protects the machine well, provides some comfort from the machine's slightly sharp edges, and the keyboard cover/display cleaning cloth is a useful addition. If only Marware had packaged the item flat rather than curled in a box 1/3rd the size!