Any noticeable improvement to routes for UK in maps?

I am tempted to install the beta on my iPhone just to get the supposed map improvements that IOS 11 is said to have. I know often in betas these new feature only work for US users - does anyone have any practical experience using it with CarPlay in the UK?

Until the beginning of this year, I had been using TomTom UK route guidance ever since the release of the iPhone 3S. I had become accustom to really good routing and added features like speed cameras and traffic. The downside was having to stick the iPhone to the car window.

I bought a new car in January with CarPlay can cant believe how poor the routing is. Even from the front of my house it takes an unnecessary 1 mile detour. Navigating to POIs is a waste of time as take you to the nearest road, but miles away from the access point for the POI. I am at the point of abandoning CarPlay and sticking my iPhone back onto the windscreen, just so I can us TomTom again.