I performed my update today. I was scared for a minute,as my mogul sat at the rainbow colored screen with the label USB at the bottom of the screen for 25 minutes. Then the screen went grey with the progress bar. After another 10 minutes the update was complete. Whew!
The default Telnav software worked right off. I double checked the settings for comm and bud rate and they were already correct. I will test how well it works and may look at how google or another software option works.
Not in a big need for this, but I have had times I wish I had it.
Update: I already have the Sprint $25 data plan, so the Telnav is free to use all day every day. No need to buy any other software. Overall, for not having to shell out another $100 for software, this Telnav thing is pretty cool
The google maps works nice too, but no voice navigation like Telnav.