I absolutely love this watch . I be a little nervous about buy it after read some bad review but I be soooo glad I buy it . it be true , it take some time to acquire the satellite signal but I have not experience a drop in the signal . the GPS be very accurate . I map my route before run and when the watch say I be do ... I be do ! you can set it to let you know when you reach certain distance . I have mine beep every mile and it help my run along . also , I love breakdown it do , on the computer and the actual watch . base on you setting it let 's you know what you pace be for each interval , you average heart rate , and you max heart rate . another plus be that it be very easy to load my run from my forerunner 305 to my -lrb- ... -rrb- profile . and base on the information you can plot different part of you run against each other . I must say I just love this watch and you should definitely get one !!!