I can hardly recommend it without reservation. Sure, you can get up to speed on the gradient, but the surface is really bad in several places all the way down to the train station. Then there's the construction site, which means dirt and gravel are getting onto the road. Since the one-way street regulation was lifted, it's become much more dangerous overall. Whereas you could previously avoid the potholes, you now have to watch out for oncoming traffic, which can be very dangerous due to the poor visibility in the area of the crests. In practice, the 40 km/h speed limit is more of a recommendation (the speed cameras and controls don't change that much), so oncoming traffic is just shooting towards you. Due to the lack of space in the bends, you have to be ready to brake at all times and drive as far to the right as possible - where the potholes are.
According to the sign, there are no winter services on ice and snow.
The climb is challenging for the same reasons. Cars sometimes try to force you onto the edge of the road, which is in a terrible state. If you go there at dusk or in the dark, you will be constantly blinded by the hills.
These are simply the dangers that you have to be aware of. Despite everything, I often drive the route in both directions. The total of four hills (including the station hill), each with a gradient of up to 15%, simply have their charm.
On Sundays and public holidays, when the route is blocked off by a barrier, you are fortunately left in peace from the traffic.
I wish the route was only open to traffic as far as the former restaurant, especially since it is often used - especially at peak times - as an alternative to the connection from Ottenbronn/Neuhengstett to Hirsau or as an alternative to the Calwer Bischofstraße.