I am trying to make a coursera path (called data science professional path) but I spend too much time with these labs because it is not working properly. Yesterday i spent about 30 minutes until I was finally able to download the file. (I don't even try to solve in the online page because of the so much bad experience) The course material is great, these labs are awesome, it would be so much easier if you would attach these labs file to the Coursera.
If labs.cognitiveclass.ai is not slow then it's down.