Compared to other solutions, the firewall is a true firewall, since I mitbekomme if I open a link from an email program for example, and can selectively block. In combination with Spybot Search and Destroy and a Java Script blocker in my Internet browser I have a very balanced safety protection.
I use the software in the manual mode and have adjusted some settings.
Good protection but also, unfortunately, one drawback: G-DATA is the software that around 600Mbyte RAM memory required and weak systems to their knees. My computer is not the newest but with an SSD and an older i5 CPU that is fast enough so I do not feel any disadvantage. Even with demanding games I can find no big speed penalty.
If your computer I would not SSD or no Powerful Quad CPU features rather recommend a software Kaskpersky. If a security is important, you should be willing to take his performance slumps in purchasing.