I have been using Garmin and Navigon for a long time so I have somewhat high expectations. I bought this only because I bought a new Chevy Trax and this is supported by my Infotainment system. A dollar isnt much to lose if the app doesnt work well but I was concerned by the app having only 1-star review.
Keep in mind that if you pay for the in-app purchase you are paying for 3 years with one map update per year and 3 years of live traffic. Nothing says what happens after 3 years, Im guessing you pay again.
Initial impression was not good. It took a long time to download maps and other data just so I could get started. When plugged into my car, the app is disabled on my phone. The menu is poorly organized, and the car seems to have more/different features than the app. When I first tried to enter my home address the keyboard was disabled until I started tapping everywhere and figured out that I need to choose a state.
I found that after exiting the app, the blue bar remained saying that the app was running in the background. I also noticed in Usage that it quickly jumped up to my highest battery user.
Worst yet, you are paying for a 30-day trial but not all features are active. Notably traffic is disabled during the trial period, which to me is a key feature. If it doesnt work, the app is useless to me.