When I've read the InfoQ article my first reaction was panic. I had experience with Red Gate which can not be considered utterly positive. The parties comments are mutually optimistic but I still have a sinking feeling in my stomach.
I wouldn't be surprised at all, if "free community edition" will evolve to the "free community 30-day trial". You will have to buy Pro version, which will allow you to add new libraries for inspection, .NET Reflector Toolbelt license for Disassembly functionality and Ultimate edition license if you actually want to translate disassembled code from German to C#.