This thing seems to work good. I am no expert on sound, but wanted it to see the difference between two sets of speakers. The unit seems to be well constructed and so far has held up nicely. Although I don't use it regularly, it is a great tool to have when setting up your surround sound system. The backlight is also a great touch, since it is dark in some of these theaters.
Rating: [5 of 5 Stars!]