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
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SIGMA PC15 Heart Rate Monitor WatchProduct Description: Sigma Sport's PC 15 Heart Rate Monitor Watch is like its users: sporty, ambitious and committed to excellence. Anyone with a passion for sport and fitness will soon find a place for it in their heart. It is an individual trainer that allows you to control, plan, and evaluate your exercise sessions with total precision--complete with Training Manager, Lap Counter and is 100% electro cardiogram (EKG) exact.
Features:
Training manager for optimum exercise evaluation and monitoring
Time menu with 7 functions
Pulse menu with 6 functions
Automatic exercise zone feature to calculate individual ideal limits
Zone indicator
3 zone alarm
Easy-to-use menu
My name function
5 language support
Lap counter (50 laps)
Backlight
Battery compartment
What's in the Box? PC 15 heart rate monitor watch, elastic chest strap, transmitter belt, bicycle mounting bracket with O-ring.
Manufacturer's Warranty Five-year warranty on defective parts or products.
About Sigma Sport Sigma Sport represents German technology at its highest level, combining innovative design with precision engineering. Sigma tests all their products in their in-house laboratories to withstand the harshest conditions, ensuring quality continually throughout production. All Sigma Sport standard lights conform to the stringent German traffic standard, and all Sigma Sport products are CE-approved.
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I've used this watch for over 3 years, and it still works pretty good. Of course it ran out of batteries quickly, but it is logic since it does not have an on/off switch in the strap, not the same case for the watch, where if not used as a heart monitor it will last almost for a year. 
