“Microsoft doesn't often get version one releases right, but this time, it has got the release very right indeed. Windows Phone 7 looks great, works well, and is a treat to use. Market success isn't assured, but judged on its merits alone, this is a platform that absolutely deserves to succeed, and I really, really hope it does.”
Pretty nice quote from ars technica. You should spend some time reading through their review of Windows Phone 7 when you get a chance.
Head on over to http://arstechnica.com/microsoft/reviews/2010/10/windows-phone-7-the-ars-review.ars and see for yourself.