All you have to do is visit the site, select the apps you want to install, copy the generated command, paste it in Terminal, and press Return to start the installation.
They’ve got the basic apps we usually install on new systems – Chrome, Firefox, VLC, Caffeine, Handbrake, Audacity. They also have Gimp, Libre Office, Text Wrangler, and Sublime Text 2 & 3.
I’m just not sure if running the same command would update the installed apps. If you’ve tested it already, you may share the result by commenting.