How is the battery life on the Galaxy Nexus?

Ive used iphones for the past 4 years or so and am looking for a change. Im used to the iPhone 4 battery life which is pretty fantastic. I can use the phone fairly heavy and go to be with 50% charge still on the phone. I now I wont get that kind of life with the huge screen on the Nexus but the 399 price has really got me salivating.

So my question is how is the battery life one the Nexus?

Thanks for your help guys and gals.