Is it worth it to join Presidency College, Chennai?

It depends on your expectation. You can’t expect great infrastructure, since it is one of the oldest institutes in the country. But it has been renovated recently. The faculty base is decent. However, many professors teach in Tamil, since most of the students are from Tamil medium. The college starts at 8:30 am and end at 1 pm. So, you will get plenty of free time to do what you want. If you utilize your time well, it is definitely worth joining the college.