Have had 9500i, build 2207, for several weeks. No significant highway trips with it. Auto mode really cuts down on needless sensitivity to doors and such. Price is worth this feature alone. But all the best features of this RD require reliable GPS acquistion. This I don't have. For no apparent reason my 9500i will take a notion to alternately lock and unlock. This goes on until it becomes apparent that the best solution is to turn it off and try another time. Thought it might be summertime heat build-up. Nope. When it works it works great - for hours at a time in the blazing sun. Have tried diffferent placement - no change. It just seems intermittent in GPS sensitivity and lock. Wondering by chance if any other 9500i users are experiencing anything like this?