Just a disclaimer: I am a T3 1L...
The OP asked whether going to a T3 school is "worth" it.
Asking whether something is "worth" it is a very relative question.
Ask yourself...how much will it cost
to go to that school?
Ask yourself...how much benefit
will you receive from going to that school?
For cost, consider tuition, housing, scholarships, debt at graduation, and what you could be doing/earning for 3 years if you didn't go to law school (opportunity cost).
For benefit, consider where you will be in 3 years and what opportunities you will have then. Call up some alum and figure out where they work, how much they make, how many passed the bar, etc etc...
Balance the two. Hopefully this gives you a starting point when you try to answer your question of whether its worth it.
Hope that helps. If not, lemme know