I recently ordered the Omron pedometer based on the glowing reviews it had and have been very disappointed. The size of the unit makes it inconvenient and bulky. It is top heavy which results in it being easily knocked off by a purse or just the natural movement of your arm. The clip is not sturdy enough to hold the unit in an upright position. Being so large (larger than some pagers)it is embarrasing to wear since it tends to draw attention. The step counting mode seem to be fairly accurate. The mile counter is not even close. After setting my stride length a couple of times and walking 4 miles on a treadmill (interval walking 4-5 mph) it showed about 2.5 miles. I used a Digi-Walker for many years and was extremely satisfied with its overall performance. Lesson learned, stick with what works for you.