Purchased replacement of a Garmin Forerunner 305 7 year old who begins to give up the ghost (the battery is not always charged), I am delighted. In a race I met someone else and got to 20 meters that person the XT 310 has detected the heart rate sensor that person, the camera is very sensitive. For the moment I do not use this sensor, I think use soon. The ability to choose which fields to display and place the choice on the screen is a plus as well as the seal. The detection of satellites is more rapid and sensitive than the Forerunner 305. Too bad that the USB connection is not present for transferring data with the Training Center software I use with the Forerunner 305.
