I know there has been a lot of talk on here about Navigon USA. I have read a lot of the topics, and read the review of the app in the app store, and wanted to find out a little more before shelling out #29.99 for an app. I am using an iPhone 4s, and I currently use Hopstop to get directions and Sendero GPS when it actually works to find out my nearest cross streets. I wanted to see if anyone has used Sendero GPS and Navigon USA? Does Navigon USA give you step by step walking GPS directions? For example, when I am in my parents car and they are driving using a standard GPS system and they make a wrong turn the GPS device says recalculating route. Does Navigon USA do this walking directions? Anyone know how accurate Navigon USA may be when going to an address for the first time? Thanks so much for any feedback.