Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: the spring is so tight that is hurts my head and ears & the sensors don't work very well
Review: This was a VERY expensive item and it doesn't work very well at all. Sometimes the sensors will pick up a heart beat and then just stop. Plus it is so tight that it hurts my head and ears to use it.
