Cool. Finally some free alternative to IDA decompiler plugin. IDA is still better due to interactive nature, i.e. you can explore the code and rename variables/functions as you keep on exploring. I hope this evolves into something like that.
Disassembly is a much easier task than decompilation, since it's a mostly mechanical process. Decompilation requires you to undo the optimizations/transformations the compiler did as it generated the binary, which is much harder.
That said radare2 is still cool, and a GUI (Cutter) is in the works.
They refused to sell it to me, unless I bought the standard version and used that for a year (which in retrospect, I perhaps should have done)