Rating: 

Good book. Nice layout. Decent TOC, but would benefit from an index. Covers the important differences between the languages. Points out helpful tips like adding [assembly: System.CLSCompliant(true)] to your C# projects to ensure they are VB.NET compatible (see page 4).

I'm using both C# and VB, so this book is very valuable.

I also bought C# language and VB.NET language pocket references. The C# one is great, but the VB.NET Language Pocket Reference IS USELESS.