I’m about halfway through and also did my undergrad at GT. Overall I’ve been pretty disappointed. The lectures are just YouTube videos played through Udacity, and the quality has varied from okay to bad. TAs make a big difference, but the quality there is a huge range. Some classes have had really good interesting active Slack communities, while others are basically just a Piazza page with people asking for help on projects. If you were disciplined and didn’t care about the degree at the end, you’d get a lot more bang for your buck just by watching the YouTube videos and reading the textbook, since that’s basically the level of instruction you get.