I've had the erisin for 6 months now, and its much better than not having a nav/dvd system, but no where near the best model outthere. Its cheap and I've begun my quest for a carputer. Why a carputer? Well why do you have a computer in your home? You can install touchscreen drivers on windows 7 as well as simple car specific software like centrifuse that allow it to look like a nav system.
And most improtantly is this:
aftermarket headunit ~ 150
cheap erisinlike nav system ~ 350
top of the line nav system ~ 1000+
and here are my prelimineray plans for a carputer:
-ASUS AT5IONT (8 channel audio, usb 3.0, nividia video card (hdmi out) 165
- Modified 9.7 in ipad screen w/ lcd controller and inverter 200
- hard drive, cords, OS, housing ~200
Total_565
Now keep in mind i'll probably spend more because i'll want more. But if you got a more basic mini motheborad/cpu you can be under 100 and you can get a smaller screen for much less. Easily keeping an entire built sub 500. But for a price somwhere between erisin poop and pioneer nav, you can have a system with vastly superior sound, video, and computing power with an infinite amount of custamizable options.
I'll take a carputer thank you