For those having problems with accuracy in the factory navigation system, I would suggest taking some time to report errors when you find them.
I live north of Houston and looked up about a dozen addresses around town. Telenav's website was accurate less then half the time. For one set of examples, it was as close as one house away, and as far as three houses away. Not a stellar showing, and this is in a neighborhood that is over 30 years old. There is simply no excuse for that.
I double checked each address with Google maps and Google got it right every single time.
I clicked on the Feedback link in the upper right hand corner of the map on Telenav.com and reported my findings. To my surprise, I got an email from a representative the next day asking for more information. I sent them the addresses that I was having problems with, including a general idea of the lack of accuracy for each. The next day, another email from them thanking me for my input. Neither email was a form letter. I was surprised to say the least and feel that there is some hope for them.
Is it convenient to take time out to report these things? No, it isn't, but I am willing to chip in to help make the product better (hopefully) by giving them some feedback. As a future user, it will only benefit me, and others, by doing so.
Is this something the IVT team would be interested in hearing?
Happy driving.