The MZ-3 heart rate monitor is overpriced for what it is, although my David Lloyd gym offered it for £60 to aid the take-up of its Blaze classes. It's basically old technology linked up to the flashy Myzone server that tries to incentivise you to the death. Very few are likely to make it to the 'hall of fame'. Many will find the chest strap too constricting and too much of a faff. Still, one advantage of the MZ-3's ancient tech is that the battery lasts months between charges. Less good is the feeble audible indication that the MZ-3 has picked up one's heart beat. Even worse is the unreliable uploading of data from the MZ-3 to the Myzone server when one's in the gym and the problem the MZ-3 seems to have pairing with Android phones. If Myzone had incorporated a heart-rate monitor in their new MZ-60 watch, they could have ditched the MZ-3 altogether and we'd all be a lot happier.