Last year Microsoft released the Microsoft Band in the US in where it sold out almost immediately and it’s been in short supply since. I imported one from the US and really love the Band, I love the activity tracking and notifications as well as the 3rd party apps that have started popping up since the release of the SDK. If you are in the UK you can now pre-order the Microsoft Band from the Microsoft store for £169.99. PC Word are also selling them for £169.
The Band is the same one as the US model and will be available from April 15th. If you want one I suggest getting one pre-ordered now going off the US release. The great thing about the Microsoft Band is that it works with iOS, Android and Windows Phone so you are not tied to one OS.
Have a look at my video guide to the best apps for the Microsoft Band, and my review of the Band after a couple of months use.