My NAV GPS system on my 2006 Avalon leaves a lot to be desired.
I live in Houston and have set my home address in the memory. Recently while downtown I programmed it to take me home. This is a 20 mile trip on loop 610 and then highway 290. Basically a straight shot with no exits from the freeway. This goofy system has me exit at every 290 exit ramp, go south, then north on the next road, then back under the freeway and back on at the next entrance ramp. Then immediately get off at the next exit ramp and repeat the process. I have noticed it also does not have many roads in my area on it that were built or extended over three years ago. Those should be on the current software.
Was recently on a vacation the western US. On the trip back I set it to take me home. I asked it for the quickest and the shortest route. It told me both were the same route. This was a 1600 mile trip from Salt Lake to Houston. I make the trip I was on yearly so knew what it was telling me was not quickest or shortest. There was no way to change it.
The route it wanted me to take was over 200 miles out of the way. It did refigure every time I varied from the route it calculated but as far as being an efficient gps worth 2000 dollars it is not.
I would suggest that if you are buying a new Avalon you forego the gps system that is an option. Buy something aftermarket that works.
I read a column detailing the electronics on the Avalon and specifically the gps problems at
www.gadgetguru.com. It is dead on to what I have experienced.