It only claims to have .. one can print any fancy figure on a battery label. Most 3rd party batteries deliver the same or slightly less capacity than the original ones.
Do note that some original batteries come with chips which will be recognized by charger and camera. Without this chip the camera might not report status properly.
It should be ok. But def it might start to have lowered performance after a while. That said, you can usually buy 2-3 third party batt for original batt price. Why not? I'd say go for it. But ultimately it is your choice.