Was doing some IR training with my instructor earlier this week, and just for fun, he had my fly an ILS approach with his Sporty's Handheld radio under the hood. It was surprisingly accurate. Got to decision height, looked up and there I was staring right down the runway. He hadn't done this with a student (or himself for that matter) before and was curious to see how well it worked. Obviously, I don't plan on doing so in "real life" but it's nice to know in a real pinch you have that as an option.