The screen will have some reflection - as all clear panel screens may have when there is a lot of bright ambient light. The panel usually compensates for that by producing a great picture, and most people will know right away if it will work for them simply by looking at the display in the store.
As for the battery, few manufacturers can rate this, since so many variables can be in play at any time. For instance, it can change based on how many programs you have installed, what your sleep/auto-off settings are, or many other variables that affect battery life.
Unfortunately, we have no way of determining this for any, all or even an average user. Therefore, we cannot offer a battery life range as a general point.
Thanks for your interest in our products, and Happy Holidays to you from all of us at Samsung.
--Mr. Samsung