Although the Nexus One is no longer available, it deserves a review. This phone was a beast during its time, and was the phone that took Android to the next level. It raised the bar in terms of design (and became the first phone with the new HTC design language) and performance.
In many ways the Nexus One (and the G1) is the HD2 of Android. While it is almost 2 years old (launching in January 2010), it still received software updates from Google up to the latest version of Gingerbread. However, now that Google has discontinued support for the N1, it will surely get newer versions of Android from the community as the Nexus One is widely used by Android developers and early adopters.
With stock Android, this phone lasts a whole day without use. With use, however, it may only last up to 2 in the afternoon, or even earlier than that. The display is underwhelming, providing bright colors, but the pentile matrix makes it terrible.
This phone is no longer available but for those who can still find it, it is the original Google Phone. It was legendary and it still is.