inputs.text: surprising quality performance - past always gone big aftermarket brands pioneer kenwood searching unit 08 avalanche really didnt like look feel continued search came across simplesoft unitthe oem design really drew low expectations menu features overall quality installing using long trips impressed offerinstead repeating everyone else said ill add notes might find usefuldoor chimes change instead long repeating tones get single beep not big deal worth notinggps amazing best ive used years since ive bought new gps integrated features wouldnt expect include trip summaries mileage calculation much altitude doesnt seem update real time like everything else thats minor issue medont expect installation instructions unit 100 plug play hardest part removing radio trimworks perfect iphone 4 bluetooth ipod functionality bluetooth phonecalls not mediadisplay seems pretty good resolution menus dvd crisp clearonstar xm not impacted install allbackup sensors work well integrate nice backup camera added display overlay shows sensors activating ie left rear center right rear obstaclesto summarize highly recommend unit quirks found no big deal