As I said in the linked thread above, I love the look and feel of WP7, and the Lumia looks like some beautiful hardware. Another thing that people don't compliment enough is the keyboard. Probably one of the best I've used, and I'd even say it surpasses the iPhone's (iOS' autocorrect has wained recently).
The only stickler for WP7 is apps (and with that developers). It lacks them. I will know WP7 has succeeded when I can get an app like TweetBot or GoodReader on it. Until then it is a fun toy, and a great backup phone.