It is one of the best designed libraries I have seen for C++ (after Qt of course :)). The API is neat, it has C, Python, Java bindings. What else would you want?
What happens with this new 2.0 beta? I installed it on Windows XP, and the EXE files don't run at all!!! All the EXE files say: "This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem."
There are no 2 star reviews.