Strengths: Very clear screen, easy to use, excellent to use virtual partner and a real motivator for me to keep to schedules and run the distances I need to keep up the training for a marathon
Weaknesses: Buttons are a little close together (looks great on the new model!!) so sometimes press wrong button to review run whilst running.
Overall: I got my Forerunner in the summer of 2004 before my first marathon and found it of great benefit in my long runs. Since then I have used it to increase my speed and to keep a log of long-distance runs and I feel very motivated to keep up the running all the time!