When autocompleting "std::e", for instance when writing std::cout << "Hello world" << std::endl;
Visual Assist X insists on writing "std::endl()", appending parentheses that need to be manually removed. This is frustrating because it interrupts the typing flow. VAX should go the least astonishment path for such common C++ uses.
When VAX is disabled, the standard Visual Studio 2008 autocompletion method completes "std::e" to "std::endl" (with no parentheses), as I would expect.