Another 30 Days journey comes to an end. For me, the 30 Days With Windows Phone 7 has been the most enjoyable and enlightening of them all so far.

The first time I experimented with Windows Phone 7 there were about it, but overall I . It took Microsoft another year and two major updates, but I can honestly say that I think Microsoft has a solid mobile OS worthy of competing against iOS and Android.

My son recently drowned his iPhone 3GS and chose to replace it with a Motorola Atrix 4G. It is fine and he likes it. Both the Motorola hardware and the Android OS seem capable enough. The couple times I have played with it, though, I have felt like it is a cheap knock-off of the real thing--like having a Pepsi instead of Coca Cola, or eating at Burger King instead of McDonald's. It's OK, but I already have the "real thing" in my iPhone 4.

Windows Phone 7.5 "Mango" is a whole different story. It is a unique mobile OS that delivers a different experience that doesn't simply try to imitate iOS--more like having a Red Bull instead of a Coca Cola, or eating at KFC instead of McDonald's. It's not that I like it better than iOS per se. I like it about the same but for different reasons.

When Microsoft first launched Windows Phone 7 and ran the about how it's time for a , and how Windows Phone 7 is , and back to life, I thought they were a little silly. I mean, even with Windows Phone people will still be surfing the Web, checking email, texting people, etc.--so how exactly is that different?