Works well, there's only one button, so setting up initially is a bit of a pain (you have to wait 3 sec's before it goes on to the next bit, when setting date/time etc & min/max hear rates for training zone.)
you have to set the training zone min & max manually & the watch beeps if above or below.
But once set up its easy, press the button to cycle through the settings & leave it 3 secs on the setting & it starts, press the button to stop.
It records your last session only, with time, average heart rate & max heart rate.
The batterys for the watch & heart monitor can be replaced (just watch batteries, would be a couple of quid)
Id recommend it, cant go wrong for the price as long as you just want a basic one, the heart monitor is accurate & I wear the watch on my left arm anyway (not sure if it works on the right arm as well)
Tells the time day & date like a normal watch too.