I use it for five years at list - it's perfect for thous who know how to get the most of it. Nobody knew what a Portable App was back in 2008 or 2009 in school. Only the geeks had them. I was already learning Linux. XD Thank you open source and thank you Portable Apps!
Please excuse caps, but it's TERRIBLE. It downloads INSTALLERS, not archives as expected. Moreover, I need to click next, next, next for each package. Sure I can write script to do this mindless clicking, but how about ordinary user? Totally not recommended, it's really true windows-style piece of... software.
This project is Windows-only, so not useful to me, but I think Linux users don't need it anyway because we can install anything anywhere from our distros' repositories. I give it only 2 stars because it should make this clear in the description, and doesn't. What PortableApps really does, is give Windows users a subset of the installation ease that Linux users have had for a long time.