Android 4.0 is arguably the most mature and polished iteration of the Android operating system that Google has ever released.  Honestly, the usability, stability, and sheer prowess increase with every release.  In addition, the first device to come with Android 4.0 (ICS) is a super-phone packing tons of power.  The Samsung Galaxy Nexus makes the Android experience snappy as you switch through home screens and applications in a breeze.  I was very optimistic about the performance of this new device; however, since it was a dual-core phone with a higher amount of RAM if you are coming from a Moto Droid X or similar you will see a huge difference.

True selling points of ICS:

• True task switching
• Snappy and lightweight
• Stock launcher is beautiful
• NO NEED TO ROOT

Normally, with Android phones you are given a lot you can play with such as the launcher, browsers, SMS applications and more.  ICS on the Samsung Galaxy Nexus is perfectly capable of handling anything that you throw at it.  As previously mentioned, the maturity of this operating system shines through greatly with updated SMS, browser, and contacts applications.

Bottom line:  Although Android is all about customizations and tweaking the phone to your desires; the Galaxy Nexus with ICS just works.  Now that Google has shown what it can do, we can only expect Android to get better and consume even more of the market.