I've been shopping around for a heart rate monitor for a while, Polar is the recommendation from everyone, however I didn't want to buy it for 2 reasons, its way too ugly and cheaply made, and very expensive for the specs, I ended up buying this HRM after I saw a cyclocomputer made by Sigma Sport, it was such wonderful, easy to use computer, so I thought their heart rate monitor would be designed and built the same way, I wasn't wrong, this HRM is amazing, very accurate, and most importantly it easy to use, straight forward, and loaded with functions without making your life complicated, it has all the features you need plus little extra for luxury, however without the hassle of digging around with buttons to get the important data output you need, it can display all the information you need with large print, so you don't have to concentrate a lot to read while cycling or running, unlike Timex or some Polar models, where the display is too small that you have to look longer to read it, quite distracting and frustrating when cycling, more over Sigma Sport utilized the whole surface of the watch to be as display (you can tell from the picture) and they placed all the buttons on the side, as a result you can get your heart rate, heart rate zone (health, fitness or Power) , your percentage heart rate out of maximum + training time or calories or lap count (you choose more if you want) all in one screen with huge print, very impressive, absolutely ergonomic design.
You can define your Max heart rate with the zones your self, if you know them, or you can simply enter your gender, age and weight and let the watch do all the work for you.
Another advantage is the chest strap and the sensor, you can change the battery by your self which is a major advantage over other HRMs, moreover the sensor is very sensitive, you don't even have to wet it to get the reading, didn't have distortion from electric signals yet, and very rarely lost the signal, when it happens the watch captures it again within few seconds.
The watch has a very attractive design, I found my self wearing it all the time instead of my regular watch, it has all the functions of practical watch, like time, 12 or 24 hr format, day and date, stop watch, alarm, backlight, plus nice looking, something you don't see in Polar models,
The watch comes with bike bar attachment so you can mount it while cycling
The only disadvantage is the size, its big and more suitable for men, I believe it would be too big for ladies arms, you can compare it in size to Casio G shock models, however its much thinner, but mounting it on Bike bar would solve this problem.
Over all I see this watch as a perfect HRM in regard to function reliability appearance and price, highly recommended