I've had this monitor for a while now and find it to be useful. If you can't have a larger monitor on hand due to portability, space, or power concerns, this is a great tool to have. Its screen provides a larger view that your LCD or viewfinder will. However, it is only 320x240 so its usefulness sits squarely with SD shooting. You can conserve your camera battery power by not using the onboard LCD viewer, and that's really helpful. Also, when mounted on camera it is easier on the eyes than the small LCD screens and you can easily take a direct look at the action and back to the monitor.