On the average, mine lasts me 20-22 hours. That's with my normal use and emails being pushed constantly to my phone.
I also use the Deep Sleep battery saver app w/ Power Saver and Blocking Mode at night, which does seem to help a lot (since service is extremely quirky by my house, for any provider).
Overall, battery life on the Note 2 has been the best experience I've ever had on Android or any other smartphone for that matter.
I still haven't figured out how some people make it to 24 hours or more, prior to charging, on a regular basis. I was only able to get beyond 24 hours, with ease, after first purchasing the phone. As soon as my work exchange email was linked up by my IT department (contstant email push), I've only gone passed 24 hours a handful of times. The great thing is, I'm no longer scared to use my phone a lot, for fear of not being near a charger.
One thing to keep in mind, that might be different than your other smartphones in the past. 15% remaining on other smartphones is a much shorter amount of life remaining than on the Note 2. On the average, when I get to 15%, I can make it last for around 2-3 hours, until it hits 5% and I go to swap out the batteries (thanks to Samsung, I have 2 backup batteries...one at home and one at work).