I installed my CarAdvanced unit this evening. Took about 2.5 hours total, wasn't bad at all, pretty easy install. On a scale of 1-10 it's probably a 3 for installation difficulty. No wires to splice, everything just plugs in. Just have to run wires for the navigation and microphone. The only disassembly required is the console.
Fit and finish is excellent, seems to be high quality. No problems at all with my Bose system, and in fact it seems to have bass now. Not sure how that happened, but the system is a lot louder.... not any more clear, but definitely louder.
Interface is top notch, very easy to navigate around. The only thing I don't like is the iPod interface. Unless I haven't figured it out yet, you can only scroll through either the artist or album, then scroll through the songs that fit in that category. This makes navigating and finding the songs you want very cumbersome and slow. I will probably just switch out to the A/V input and use the iPod A/V outputs and use the iPod itself to play the songs (that way I can even do video off the iPod and hook up other devices).
DVDs work great. The sound effect feature is a bit overdone, a lot of echoing, so I just leave it off. Otherwise the sound and image quality on DVDs is excellent.
Bluetooth works good. Syncs up with my Razor V3XX without any problems. Sound mutes when placing or receiving calls.
Radio... well it's a radio. I like being able to click the station I want to listen to.
GPS works well. I've only messed around with the Route 66 so far, but it has all the basics. I was planning on switching to Igo8 or TomTom, but I am not in a rush since this works fine how it is. Finds addresses well and has a good list of POIs. Easy to save custom POIs, switch routes, zoom around the map and navigate. Radio mutes when the lady talks to you.
Overall I am very pleased with this unit. It's an all-in-one clean package that does what it says and does it well. I haven't tried any of the add-on options, but I'd like to hook up another screen for the back seat and maybe figure out if I can get the TV function working.
If anyone has any specific questions I'd be happy to answer them.