If Toyota is still using the same Nav program that they did in '05, I'd be very very hard pressed to upgrade. I just came from using the one in my Dad's 05 Tundra and it simply doesn't compare in any way, other than being built in, to the new stand-alone gps units out there. It doesn't even tell you when you missed a turn, it just reroutes you. For those of you who have it built in, I expect to get flamed for saying this. And I'll cut you off--yes it is nice to have it intergrated, but Toyota really needs to update their program. It is like a French made program or something!