I have just acquire this to help I train . it work at treat be simple to use for what I use it for -lrb- exercise in certain heart rate zone -rrb- . there be much more you can do with it but I havent try yet . the ability to store you workout in the machine and upload they to a pc to reviw they be good and again simple to use . the only minor quibble be : - because of the slight variation in fix the pace reading tend to shoot up and down but this can be smooth and I havent try that yet - the bundle map in the training center software be not very detailed for the UK .