I bought one a few weeks ago and my only complaint is it needs a set of lights that tell you it's on and at what speed setting. You can stop the prop by hitting the - (minus, or slow button) but the unit will still be on. If it had a light bar graph that showed speed, you could change if you want to, but be able to return to the previous setting. As was stated before, there is no easy way to run the wire from an external transducer.