The project was launched at least partly to catch up with progress that was believed to have been made in remote sensing in the Soviet Union. The project was eventually terminated, according to the official report at the time because there was insufficient evidence of the fruitfulness of the research.
However, there is a good deal of evidence that the research and experimentation was successful, as is explained for example in books by Joe McMoneagle, and in the writings of Ingo Swann and Hal Puthoff. At its best, remote viewing was conducted under well-defined experimental protocols (rules) and the viewers were able to discern features of targets, sometimes with astonishing accuracy.
Remote viewing is a neutral term, chosen by the Stargate researchers, for what in other contexts is known as astral projection.