Initially it looked a little rough on the edges, but when you take a look at the templates you make: GREAT!
I used to have my own code handling my specific download needs, but this plugin offers all that and more. The features offered is compared to none and beats any other download manager hands down (I tried most of them).
Specially love the use of templates, and the support of so many extra info (version, MD5, uploaded, downloads, last downloads, copyright, OS version, requirements, language, related post, etc etc).
As for being resource hungry (other review): I didn't experience that problem.
Also; if you really like this plugin (like I do) then consider donating some change ... :-)