RAS product, it fits perfectly with my Canon 650D! this is my first grip, and I confess that amply satisfies me. This is an excellent value for money and I do not see the difference with that of the manufacturer brand that is more expensive. Aside from a slight tightening of the game on roulette, it works perfectly fine.
As some have specified, the batteries supplied in the kit are many Delamax Phottix's and not as stated in the announcement. Personally, I see no difference, even if only in use without grip we see that they are less autonomous.
I highly recommend this product!