I have not used this product. Pearstone as far as I know is owned by B&H, and B&H is a very reputable company that can be trusted.
It is 100mAh less then the Nikon OEM battery. It is safe to assume it will not last as long.
If it costs 41% less, and it lasts a month shorter over long term use, seems easily worth it to me. You can buy two of them for roughly the same cost, and I would expect under my usage to get around a year and a half to two years of usage out of any battery, third party or OEM(and I've used many of both in various DSLRs).
I wouldn't trust a single person telling you they had experience XYZ with this particular model. The B&H product reviews are instead a much better indicator. With 63 reviews averaging 4.5 stars, it is safe to assume the product isn't a complete flop.
This existing question covers most of the concerns around 3rd party batteries: Should I buy an original manufacturer battery, or is a generic brand OK?
It may be important to note that these batteries are specifically NOT "2nd source" batteries. They are unlicensed third party battery manufacturers in the cases I have seen. They reverse engineer the technology and are not licensed by the OEM.