Do you really have to know or care about the vtable and how it works when none of that knowledge actually helps you write well structured object-oriented C++? Once you learn how the Microsoft vtable works then you have to learn how the <insert_compiler_dev> vtable works. The best way to visualize the vtable in MS compilers is to put a watch on a class instance and dig down into the resulting tree of 'stuff'.
The important part here is that you understand the concept of polymorphism and the power and flexibility that it offers.