First I bought the Garmin Forerunner 405 without heart rate monitor. A stupid idea! As quickly ordered the chest, created and immediately he was recognized. It is comfortable to wear, even over much longer distances (20km +). Long story short, I do not see any flaws. For one or another may be the length of the sensor can be a problem overall. But I personally felt that not so and would buy it to me at any time.
