Want to find out what the Windows Phone 7.5 Mango experience is like, Microsoft has a easy to use demo for Android and iPhone owners. You can run a Windows Phone 7.5 Mango from your own Android or iPhone without installing any software on it.
Just point your mobile browser to http://m.microsoft.com/windowsphone/en-us/demo/ you will be taken to a interactive HTML5 page. The demo puts a Windows Phone 7.5 interface on your phone ans shows you how things are done in Windows Phone 7.5.
The demo runs smoothly on my HTC Desire HD. I tried the demo on the lower powered Samsung Galaxy Ace, and it works, though it run sluggishly.
It looks like Microsoft has learned a lot from their failed 2010 Windows Phone 7 launch and has spent more time coming up with schemes to push Windows Phone 7.5 this year.