HTC Nexus One by Google (unlocked)

Pros: Integrates with Google services (Gmail, Finance, Chat etc)
Fast and responsive (sports a 1GHz chip)
3.5G and HSDPA support for fast internet (not found on the iPhone)
Run multiple applications simultaneously (not available on the iPhone)
5MP camera

Cons: Some users may prefer a keyboard, although the virtual keyboard is very good on the Nexus One;
Marketplace has yet to offer as many applications (although managed to find everything I need including SatNav applications free)

Summary: Have previously owned an iPhone, HTC Diamond and Nokia N95. I've engaged in mobile phone development on such platforms as Windows Mobile (C#), iPhone (Objective C) and Android (Dalvik Java) - I've had some experiences which suggest that the Android Operating System is at present the best Mobile Operating System available for mobile devices. We were just waiting for the right device to kick things off and the HTC Nexus One is that device...

If you intend to use a mobile phone for just phoning, the Nexus One is not the so-called "phone" for you. Something simpler may be more applicable. What the Nexus One is, is a fully fledged computer and in that sense you could consider it like any Netbook or Laptop on the market - you should expect the Nexus One to do everything your Netbook or Laptop can do, but with a smaller screen.

The most important benefit of the Nexus One is it's integration of Google Services, like Gmail, Chat, Finance, Maps and other social networking applications like Facebook and Twitter. Services can be synchronised providing seamless interaction with the Internet services you are used to. The technological improvements are not lost on the user either. The 1GHz Snap Dragon chipset provides a very responsive experience and the capacity to use 3.5G, HSDPA standards and WiFi for fantastic internet connectivity is excellent and (3G and HSDPA are not found on the iPhone making the internet sluggish). The Nexus One (being Android) allows for multiple concurrent applications to run (Apple disallow this). I found the device to survive very well for 20 hours (with WiFi and GPS on). These features can be switched on and off easily to save battery power. Not only a good all round consumer device, it provides a great platform for developing applications as well, not requiring signing like both Apple iPhone and Nokia applications.

Other applications like Google Voice and Speech-to-Text are also provided and surprisingly good given that they are new technologies. Speech-to-Text is quite accurate allowing a user to talk to the Nexus One instead of entering text into text fields using the virtual keyboard. Music can be accessed through the Google Player, Spotify or the Amazon MP3 Store.

Almost everything is customizable and if you're really so crazy about multi-touch, multi-touch will be available in Europe but not in the US due to Apple patents. Installing and un-installing applications from the Marketplace is easy and quick.

All in all, a completely different experience than what I've had with other phones and a glimpse on a bright future for the Android Operating System - definitely a device worth heavy consideration.