Boo or C#?

I am starting to use Unity3D. The language choices are Javascript, C# and Boo. It seems that Boo is a programming language for .NET with a syntax similar to Python. Do you have any experience working with Boo? How does it compare to C# performance wise? I guess that the code is more readable and compact with Boo than with C#, so, if they have similar performance, Boo would be a better choice for Unity3D projects?