frankraney Loc: Clovis, Ca.

Basically yes..... But you may have to add up to a stop of ev......

You set your f stop for depth of field you desire and, and shutter speed to control how long the shutter it's open, and the camera will set the iso, third leg of the exposure triangle.

ronpier Loc: Poland Ohio

Try it. I use it most of the time. It allows you to set your highest tolerable ISO limits and lowest tolerable shutter speeds. Great for the changing light conditions while shooting outside. Check out Steve Perry’s YouTube video.

tsca Loc: USA

via the lens Loc: Northern California, near Yosemite NP

"is it any good" is an interesting way to put the question. Perhaps it's better to ask if it can help provide you with more "keepers" in some situations? Auto ISO, like every tool in our cameras, is very good to use in some situations and not so good in other situations. You must learn when it's best to use it or not use it. If you are going into and out of buildings and shooting both inside and outside it's a wonderful tool. If you are shooting animals in early morning light or light eventing light that is changing it can be a good tool. In any light that is stable and unchanging you would not need to use it. Be sure to set a maximum limit that works well for your camera. Using Auto ISO does not mean that every shot will work out as you hoped if you are pushing the light when trying to take photographs. I'm sure there are other good uses for it too.

awesome14 Loc: UK

Auto iso works for situations in which the iso needed varies by a few stops, and you want the remainder of the settings on manual. One situation which it does not work in is photographing anything that requires a slow shutter speed, i.e. using a tripod. Unless you set an upper limit with auto iso.

topcat Loc: Alameda, CA

Works great for me. I don't use it all the time, but when I do it works great.
I like using it on manual, where you pick the SS and Aperture.