Rating: - I think they have poor quality control.
Got two of these and both would not function. Had to return them both. I gave up.
Rating: - Omron Heart Monitor
A very good product for the cost - provides everything as advertised & a very good basic heart monitor that includes compatibility with my gym's equipment. The only feature I miss is not having a summary for how long heart was in zone for specified workout. This is a common feature on gym aerobic equipment.
Rating: - Works well
This does exactly what it's supposed to do without being overcomplicated. If your looking for an inexpensive, simple heartrate monitor, this is it.
Rating: - Omron HR-100C Heart Rate Monitor
Good price no frills efficient and effective device which delivers just what it is intended to produce.
Rating: - Works as expected
Starts working in a matter of seconds of putting it on. The only concern is that sometimes it registered heart rate of 195-210 for me. I am not sure if it really went that high for a few seconds, or was the monitor behaving a bit erratic. Other than that, works as expected (I also verified accuracy by manually counting pulse at approx 90, 110 and 130 bpm).