The free version is all you need if you want to download files (not videos), and it's much faster than paid Internet Download Manager.

Compared to IDM, it also does not need to rejoin parts when the download is over.

I have a fast 3G Internet connection, and I often download up to 10 5G files in parallel.

With IDM, rejoining the chunks takes forever.

In addition to the actual download speed being better, that makes a HUGE difference.