Heres why -
-It looks like something from the 80's
-The battery life is pathetic
-Its far too sensitive, my tv is on very low and it picks up every noise, sending it blaring out of he tv of every poor bugger who doesnt have one.
-The 'mute' beep is ridiculously loud meaning you cant realistically have it on mute in your ear,
All in all, another piece of rubbish gear, two years too late and a waste of money imo.