Having a dual-boot setup is the easy part. The hard part is being bothered to restart your system every time you want to run a Windows application.
And that's when you install wine, accepting the eventual glitches are less of a bother than restarting.
WINE has become so good lately that I rarely find any WIndows programs that don't work. Even command line programs run like a breeze from Terminal. Just run: wine "program.exe" "argument" and most of the times it will work as expected.