Consistent battery life isn't a mainstay of Android use, as longevity is dependant on how many apps you run, and leave running in the background. Using Google Maps' built-in navigation, for example, is a sure fire method for killing a fully charged battery on no time and streaming music from Spotify over 3G doesn't do too bad a job of sucking power, either.
Knowing that it's possible to drain your Nexus One of power in almost no time at all is a small price to pay for being able to leave apps running in the background, though. Realistically, you'll be charging up every night with normal use and resorting to the an occasional midday top-up should you really stress the Nexus One's 1GHz 'Snapdragon' Qualcomm CPU with too many tower defence games. This is entirely on par with just about every smartphone on the market at the moment, so we've no complains against the Nexus One on these grounds.
Strangely, the Nexus One's display isn't the sharpest-looking we’ve seen, despite an 800 x 480 pixel (WVGA) resolution, which matches rival handsets, such as the Samsung Galaxy S. This seems to be a side effect of the PenTile matrix arrangement of sub-pixels in the screen. It's not enough of a problem to make the Nexus One unusable, by any stretch of the imagination, but some users might find the slight hazy quality annoying.
Holding the fuzzy pixel issue aside, the Nexus One's display is to be applauded for its viewing angles, which are superb, but dare to venture outside with the Nexus One and the display may as well not be present. Fortunately mobile phones are rarely used while out and about, so this shouldn't prove at all problematic! Colours aren't as saturated on the Samsung Galaxy S, but the AMOLED display is still characteristically over-vivid. The TrustedReviews homepage was rendered a particularly radioactive shade of orange.
Interacting with Android through the Nexus One's touchscreen is a frustration-free experience. The display seems responsive and accurate; we found the on-screen keyboard to be perfectly useable, once we adjusted to it. Android's auto-correction still isn't quite on par with that of Apple's iOS, but for quick emails and the odd SMS it's perfectly sufficient. Apps run expectedly fast, with the Nexus One's 1GHz CPU never appearing phased by the demands made of it.