NZBVortex is an extremely user-friendly binary leecher, in that it downloads and joins all segments, determines the need for recovery files, downloads and runs the recovery files (if needed), and cleans up everything but the desired files(s) all n a single click. Nothing one can't do for free, but the streamlining of the whole process makes it worth the $10.
However, there are two caveats. Number one: It deems a good number of NZBs as "invalid," refuses to run them, and suggests to re-download. Doing so never seems to alter their validity, although Unison will run the same NZB and all the segments download and join without a problem. The really odd thing is, this problem never occurred with the free, unregistered version of NZBVortex, only after I paid. In fact, it ran a particular NZB in unregistered mode, then refused to run the same NZB after I paid. It almost makes me recommend not paying (although you're speed throttled in unregistered mode, which nixes that idea)
The second caveat is a bit more philosophical. NZBVortex is a leecher, period. Meaning, if everyone solely used it, there would be nothing on the usenet to leech. The makers profit from the kindness of others and give nothing in return. So, there was a tinge of guilt handing over ten dollars, justified only by the fact that I use NZBVortex only for convenience, and regularly use other programs to contribute content that it leeches off. Still, I would have gladly paid double the price if their program compressed, segmented, created recovery files, and UPLOADED with the same ease in which it downloads. They would only be adding value to their product, and may want to consider it in the future.