this is not the first heart rate monitor that i've used but this is by far the best one.
I started out with garmin run HRM which i got with my garmin forerunner 920xt,lost it got GARMIN HRM TRI(a friend got it from US at half the price they offer in here) stopped working recently because the rubber on the top was gone. ordered this and this turned out to be the most lightweight, slim and good looking among all three. fits better as well and stay in the same place no matter how much you sweat(i sweat a lot). the only downside i felt was it doesn't give GCT balance data which garmin hrm offer.
Seems easy to use . Easily paired with a smartphone. So u can see ur statistics as u cycle and later too. Even when worn under t shirts, has no connectivity issues. Overall good