It seems that the biggest complaint has to do with the cost of the Nikon grip. When the D300/D700 grip was introduced, it cost about $250- which I bought. At the time, I did feel that it was a somewhat fair price. However, a battery grip that costs over $400 seems high to me. There does not seem to be any advanced technology built into a battery grip as compared to an Ipad. When I compare the materials and technology of an Ipad with the Nikon battery grip that costs nearly the same and in some cases costs more- I feel comfortable trying the Pixel grip.