I decide to purchase this watch to help I train for a half Marathon . what a great training aid ! this watch can do just about anything you can imagine . naturally , it record you precise pace and distance , which be helpful , but it also allow you to set up a advanced workout . for example , if you be suppose to run 3 mile , then run 4 2 minute aerobic interval and then run another 3 mile , you can program this on you watch so that while you be run , the watch will notify you when you need to speed up or slow down . the watch also come with a heart rate monitor . after each run , I like to review how I do on each section of the training -lrb- i.e. pace , heart rate , etc. -rrb- the program be easier to set up on you computer than on the watch , but once the software be install , it be very user friendly and just take a couple of seconds to sync to the watch . I never run without the watch anymore ! the watch also have mode that be specific to other activity such as biking , but so far I have only use it for run . I would highly recommend this watch for anyone who be serious about training for a race , or even someone who just want to have a easier way to monitor and improve his\/her workout .