So far so good. I used Wire Mapper which works great. Also a length test that seems to work. The toner works too, but it's not as good as a high-end random that can go 10 miles. If the toner was of better quality I would give it 5 stars. The toner has alligator clips, RJ45 and RJ11 adapters which is nice. It comes with cheap headphones - so you can listen to quiet audio over longer cables, I suppose. A really great piece for the price.