Nice mention of unit testing, lack of bugs, and units of measure. Can't put down the exploratory nature, either.<p>The only nit I have is the way MS keeps wanting to pitch F#. I know the spin is to use F# for math-y type things, but I really don't know why you just wouldn't use it for everything. I mean, underlying it is the CLR and the OS. It's not like somehow if you know F# somehow you need to also switch to C# to make a window. In fact, if you keep it functional, many times your functions can work their way into what you previously thought of as framework code, simplifying the entire kit and caboodle. I find that every time I switch languages, start declaring mutable values, or framing up reusable classes -- I end up severely limiting my options for refactoring later on. And functional code is nothing if not hugely refactorable.<p>Simply because you can switch languages doesn't mean you have to, or even that it's a good idea to do so.