I have created a course using Garmin Connect and uploaded into my watch. I have then navigated the course, but I noticed the watch sends me notifications to turn right or left quite late, it is also not always clear if I need to continue to the main road (for example stay in the main road but slightly turn left) or turn left to another road.
Overall I found very difficult to run and follow the indications on the watch, I had to stop a check on the map for few seconds before understanding the right path.
I hope you have tips that can help.