so if your dog died to ground because you couldnt locate it, and you got the chance of getting it back for 350 quid im sure you would take it, and as that is a impossibility id say that the price of the B&F is more than worth it
But that's the point, the Deben one works perfectly well, do you really need more than 40 feet? Why would you want to spend any more money than is necessary. What if they brought one out that worked to 100 metres which cost £600?