Review: "Call quality is only so-so." (cnet.com)
Experience: most user speech was unintelligible to called party in a moderately noisy store.
Product: Sony DR-BT160AS wireless stereo headset, which has very good stereo listening quality & probably works sort-of ok for talking in a quiet room or stopped car.
Shop: Sony Outlet Store in Tualip Washington, about an hour from Seattle. A very nice shop & worth returning to for good deals on electronics.