This is a very nice, high-quality extension.  It is wider, and has a flat top on the support (opposed to the curved bar on most miter-saw extensions).  In addition, it is longer than the extensions you typically receive with a 10" miter saw.  The screws to secure it are self-tapping, which is explained in the instructions, so be prepared for that.  I use it with the DW703.  The only reason that I didn't rate it 5 stars is that if you want support on both sides, you need to purchase 2 of the DW7080's.  This gets a bit pricey, considering many saws come with extensions included.  A partial solution to this is to purchase the DW703K, which includes one extension for the same price as the DW703.  Overall, however, the combination of a DeWalt saw and these extensions are well worth the price.