Unrestricted recommendation (see Edit)

For this price you get a 10m extension cable with safety plugs in very robust but at the same high-quality workmanship.
The cable and especially the plug and the plug receptacle feel "thick", "difficult", stable and therefore very trustworthy of.
From my current perspective, it is the least expensive 10m extension (at least on Amazon, see Edit).

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Conclusion:
The purpose of the cable is fully met.
I may here mention anything negative and would recommend the product without restrictions.
5 *****
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Edit 10/11/2012:
Now I have seen that "Unitec" products are also sold in some hardware stores. The same product, there was at the hardware store on site for 2 cheaper!