Summary: I use this with my D700 and a 20-35 lens while on vacation or just on the streets of Seattle.This should be one of the main accesories together with memory etc. I was able to disassemble the strap and was able to use it with RRS L bracket... this is an awesome strap, very comfortable, need to wear it a little lose so you can operate all camera controls with ease.
Summary: I haven't actually used this in the field yet, but I expect it will be a big relief to my hands and/or neck from carrying around a d700 with 70-200 lens all day. Immediate limitations I have noticed so far are that I can't use my vertical grip with this thing on my hand (which s*cks because I just bought the MB-D10), and I can't set my camera flat down on a table because of the small handstrap base; I'd have to balance it on its lens.
Pros: A must for heavy gear, Nice leather
Cons: Can't set body down flat, Can't use a vertical grip
Summary: Works great! With this hand grip I don't need the shoulder strap, which is always in the way. The grip works well on my D60, even though it was designed for larger frame camera's. The only negative is I have to loosen the lower attachment to remove the camera battery; other than that..perfect.
Summary: Easy to fit on and secure. I have mine on the D90 and the only caveat is that the strap makes it a little close to work the thumbwheels. For years I've wrapped the strap around my hand to hold the camera (my old D70) in one hand. the AH-4 makes the camera feel as if it is part of your hand.
Summary: this is great for using your camera in a studio style setting where you are not moving around as much, as say hiking. I like not having to deal with the strap in a studio setting. fits well, downside replaces tripod mount adapter, kind of pricey for what it is, but it is made well, and fells very durable
Pros: Durable, Easy to Use, Improves Function, Lightweight
Summary: The Nikon AH-4 grip is very secure and easy to adjust. Initially I had to experiment with how much strap tension to place on my hand to keep my Canon 40D and 70-200mm F2.8 IS USM lens well controlled. This resulted in painful pressure points early on but as I got used to the grip I was able to adjust it appropriately and had no further pressure or pain but was able to keep the above camera and lens combo well controlled.
Pros: Durable, Easy to Use
Cons: Both hands for controls, Creeps over Battery Door, Limited to One Body