I hope it's not too late. But the 2008 Toyota Avalon Nav system is definitely the worst Nav system on the market. I just bought one 2 weeks ago. I'm still trying to get Toyota to do a free upgrade. The problem is the entire climate controls, audio, Nav, and voice recognition are built into the same system. The Maps are out of date, voice recognition is very poor. And unless you pay for the XM Module directly (about 600 upgrade price), Satelite Ready doesn't mean XM radio is included. Also if you opt to pay for the XM, it only displays the first 10 characters of the artist and song title. Most CD's won't display cd title or track names unless it's encoded properly in the format they read.
If you get the 2008 Avalon and Nav system, DEMAND they subtract the entire cost of the Nav system from the price. It is NOT worth a single penny. The car is great! It's an entirely comfortable drive. Nice pickup, smooth, and a dream to drive. My only gripe is the Technology for a 2008 vehicle that is aproximately 4-5 years behind (in my estimate, and I've been in tech for over 20 years) .
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