As others have mentioned, its very good in a limited number of builds. For a ranger, I would not recommend it.
Shot on the Run could be a decent feat for a archer ranger. Note that spring attack and shot on the run work differently in 3.5 than it did in 3.0. In 3.5, you can can move,attack,move as your ATTACK action...that means you still have a move action left.
So you can move 30 ft as your move action, then move 15 feet, attack, and move 15 feet as your attack action.
Shot on the Run could be a decent feat for a archer ranger. Note that spring attack and shot on the run work differently in 3.5 than it did in 3.0. In 3.5, you can can move,attack,move as your ATTACK action...that means you still have a move action left.
So you can move 30 ft as your move action, then move 15 feet, attack, and move 15 feet as your attack action.