I would give the unit and the Seller 5 stars except for 1 major problem: It will not turn on (blue light flashing and seen by my iPhone 5S a foot or 2 away) if the temperature is about 45 degrees** or below. Read on for details...

I received the unit when AM temperatures were hovering around 40 degrees in the morning in the Denver area where I hail from. Sometimes the unit would would (power-up and connect), sometimes not. Sometimes if I waited 5 or 10 minutes during my AM commute while my cabin warmed up, unplugged and then plugged back in the Kinivo, it would work again and sweet music would flow from my iPhone 5S.

Over the next few weeks I took note of the morning temperature in my garage and if the Kinivo would turn on or not. If it was colder that AM and the Kinivo didn't turn on, I had to wait until my cabin hit 40-45 degrees, then I HAD to unplug and plug it back into the cigarette lighter for it to power up. It wouldn't magically just turn on when the ambient temperature got warm enough.

After realizing that it wouldn't turn on unless the ambient temperature was about 40-45 degrees, I emailed the seller. They had me go through the usual factory reset, etc. and told me that this unit is designed to work in a range of temperatures and humidity. After I confirmed that resetting the unit didn't have an effect, they mailed me a 2nd unit FOR FREE (and didn't ask me to mail the original one back, either - KUDOS).

Unfortunately the 2nd unit exhibited the exact same issue. I experimented by plugging both Kinivo's in to 2 separate power outlets in my car and they magically only seemed to work (or not) work at pretty much the exact same temperature ~ 40-45 degrees.

For some people this might not be an issue because your cigarette lighter plug might be easily accessible while you're driving, but I like my wires hidden (which is why I'm using bluetooth and not an AUX wire in the first place). My Kinivo is plugged in and wires neatly tucked away in my center console so waiting for the temp to hit 45 and then digging into my center consoles nether-regions during a commute is not fun.

I use a few other bluetooth devices regularly with my iPhone so although I tried "forgetting this device" on my iPhone, it had no effect on powering-up the remote Kinivo, as I didn't expect it to but hey, you gotta try.