The app doesn't appear to be very popular on iOS. For some reason there's a lot more reviews for Android. For the prior versions on Android, between the truck and RV product, there's over 500,000 downloads and 4,000 reviews. The new versions haven't been out that long so not many reviews yet.
Not sure why the subscription price would be a hangup for some people. A new GPS is $400 and if you keep it 5 years that's $80 / year. I'm not a subscriber yet and am not sure if I will be. I'm hung up on the traffic not influencing the route selection and ETA.