Another MS product I no longer recommend and seldom use. Instead, I use Visual Studio Ultimate models augmented by Balsamiq Mockups and/or Gliffy diagrams.
It became too time consuming and frustrating to determine which specific Visio package (SKU) was needed. Features were simply eliminated (e.g. Visual Studio Integration for fwd/rev engineering), crippled, or moved to some not-readily-identifiable product packaging. Bewildering :-/