Because I like to test...
Machine: Windows 7 (SP1) x64
The installation of "Avira Phantom VPN" installs "Avira Launcher" in your task-bar. From within that launcher you can install any Avira software, I just installed "Avira Phantom VPN". You can also make an account from within that same launcher which opens a webpage in your browser. I made an account and logged into the application.
After that I started "Avira Phantom VPN" and saw that I had 1GB data limit per month. There is a small Settings window that gives you the choise between a dozen servers and a few other settings.
Speed: 40-45Mbs Download and 3-3.5Mbs Upload (ISP line speed 50/4 Mbs).
OpenVPN (256 bit encryption) and server side DNS servers.
They say they don't monitor your surf behavior.
So this is a real VPN and not some cheap proxy...
I didn't ask for "Avira Launcher" (1 service + 1 startup item extra).
Avira collects a hardware profile of your machine, they call it your "Protected Device"...
My personal opinion:
Good VPN: nice speeds and good security!
Privacy is always a week point when you get limited data because they have to monitor and keep track of you to know how much you have used up!
Hope this helps you decide!