I have a GROM-USB3BT that worked great on my '09 LX570. Full featured integrating USB and BT inputs to the factory system with solid sound quality. Works as factory with full steering wheel and HU control integration and nothing showing on the outside.
I just replace it with a Tesla style HU. If anyone is interested in the GROM unit, PM me.
I just replace it with a Tesla style HU. If anyone is interested in the GROM unit, PM me.