NZB Drop is a sophisticated Usenet downloading utility, specifically designed to work with .nzb files, a new file format used to identify binaries posted to Usenet newsgroups. Used in conjunction with a growing number of Usenet search engines, NZB Drop allows you to download the content you want directly, without having to wade through thousands of headers to find what you're looking for.
This review was originally posted on VersionTracker.com. MacPAR deLuxe reports checksum errors on about a quarter of the rar segments I download with NZB Drop. These can usually be fixed, but downloading all the par files and waiting for the rars to be restored is very time-consuming.
I do like NZB Drop's interface, the fact that you can unqueue items, the ability to use more than one server, and the fast download speed.
But until they fix the checksum problem, I'm going to stick with Unison.