The battery life is excellent, 3 to 5 days with my typical usage (Internet, email, netbanking, reading (Kindle app) and some small games).
Apart from that, the Tab 3 comes with the excellent Android Jelly Bean 4.2.2, no complaints. The overlay Samsung (TouchWiz) is very discreet, if not invisible. An update to Android 4.3 is officially provided by the manufacturer in the coming months.
Finally, a 10-inch tablet here was of excellent craftsmanship: powerful, very fluid, very responsive, the correct quality, very good screen. Really very pleasant to use.
For Tab 2 users, it is clear that the Tab 3 is not a "revolution", but definitely a great "evolution." Samsung signed with Tab 1 March friendly product, coherent and well finished. The price / quality ratio is very high in my direction for this tablet, probably one of the best in this category. The report becomes even enjoying the great 50 Euros discount offered by Samsung (currently, up to 10.15.2013).
(As with any tablet, do not forget to keep some extra euros for the purchase of a cover that will protect your valuable equipment.)