I have 7 and my battery life is great. I use GPS nav a lot when I'm driving, listening to Podcasts or News with Bluetooth in my car, and moderate usage the rest of the day. I usually have around 30-40% when I get home in the evening depending on how much driving I did that day.
I don't like to keep it on the charger overnight so I will usually wake up and plug it in while I get ready for work and charge on the way to work. Sometimes that'll get me up to 100% but often I will start my day at 80-90%.