Just got finished swapping out my Pioneer AppRadio 2 for a JVC KWNT800HDT in my RX-8.
It took about an hour because I had to undo the mess of taking out my PAC TR7 (used to bypass the Pioneer) and clean up the wiring before I stuck the JVC in. I mounted the GPS antenna behind the middle AC vent, and the SiriusXM antenna to the back seat of the drivers side.
Took it out on a test drive to test out the Satellite and GPS signal, and both performed fantastic. I did lose the GPS signal a bit with the tall buildings in Downtown/Midtown Manhattan, but it was negligible. Best GPS I've used by far. Bypassing the unit only consisted of grounding the parking brake wire.
And the one thing I wanted the most, was Bluetooth Audio which worked perfectly with full track information on the unit using my Lumia with Rdio. My Nexus 4 also worked but did not broadcast the AVRCP information to the unit.
I went from AM/FM and iPhone compatibility to AM/FM/HD Radio/SiriusXM/Bluetooth Audio/iPod/Pandora/DVD/CD/SD/USB and everything controls perfectly with my steering wheel with Metra Axxess AWSC.
This pic does not do it justice because it highlights the radio in an unflattering way. In person, it looks a million times better than the Pioneer did, and much better than stock. It demolishes the Pioneer in sound quality too.
Next week I am going to install a sub box I had lying around. I'll take a video of everything then.