The routing algorithm sucks, and their map updates are hopelessly infrequent given the subscription costs.

There is a road I travel that is about 10km long; at the end of the road is my destination. Literally.

The limit on this road is 100km/h. Wayfinder would have me leave this road and take an alternative road that is also 100km/h but is longer and goes through a town at 50km/h and ends up at the same position as if I drove straight on.

I can get a third of the way along this road with wayfinder still insisting that I turn around and take the longer and slower route.

And this is just one example. Current maps and decent routing are the key requirements for gps software, and wayfinder has neither.