Comparing AI4ALL Summer programs

Anybody has any view on which of AI4ALL summer programs are more competitive as well worth the effort between the UMD I4C, GA Tech and Stanford AI4ALL. All are virtual this summer but the costs vary between usd 300 to 500 to 2k for the Stanford one - any views will be helpful

I would say the cheapest one is the most competitive (free would be ideal, but if you can get the fee waived for other ones, go for it!)

Thanks so much. If anybody has experience with these programs it will help to get their views