I'm thinking of installing a Gromaudio device that, if your car radio
has a CD changer input jack, allows for USB input, AUX input from a
cellphone, and for another $50 Bluetooth use of the cellphone through
the car speakers and an add-on microphone (in addition to the first
$150).

The most important feature for me is the USB input.

Do any of you know anything good or bad about Grom audio? Do any of you
know a competitor you would recommend (instead?)?

For example, Crutchfield sells a similar device that is only $70 for
everything (except the microphone and I can't even figure out how to
plug a microphone in). But assuming a microphone would work, would you
assume the one that sells for $200 is better than the one that sells for
70?


I've read as many reviews as I can find, but I wanted your opinions, and
I wanted to let you know such things are available. I never heard of
them before 4 days ago.

Their webpages will tell you if your car factory radio is compatible.
They say they even retain the use of SWC, steering wheel controls.

There are one or two other companies that sell devices that have
everything but the USB input, and I found something on ebay that had
everything and was only $18. At that price it's worth trying it just in
case it works, but based on the pictures, I don't think I could find one
that fit my particular jack. Hmm. Now it says "Only 4 available" and
the price has gone up to $20.