I have purchased 3 Opteka grips for Canon dSLR's and like each of them quite well and have had no problems what so ever. They, too, come with an adapter that will allow you to use AA's if you are in a pinch. They feel rock solid and fit my hand well. Since they hold two batteries, I have never had to switch in the middle of a day. Some, on here, have mentioned that after a few years of use, the letherette covering starts to peel off, but I have one that has had a lot of use for over 5 years and it is as nice as the day I bought it. They MAY not be quite as nice as OEM, but for 30% 0f the price.....? I doubt if they are that much better.