I own this battery now has six months under constant use. I can not confirm that this part by last longer than the original battery. I've been using my good old S2 mostly just to be online. After approximately 13 hours deadline is funny with, then go to the charging cradle. My old Samsung original battery lasts also to the 12-13 hours and is my constant companion charged in Portmonähhhhh ;-)
To buy or not buy? Buy Yes, if you do not have high expectations and once again what would have fresh, not possibly buy if you think the part saves 24 hours.
My opinion is of course subjective, but - since six months in use - already controlled subjectively.
