My daughter just completed her first year in CH. She only had a TA (who was almost finished with her degree) for one class- a foreign language class with 22 students. Most of her classes were relatively small. She had 3 large intro classes ( 100-200 students) that were taught by professors- the TAs taught the smaller review sessions and she had a positive experience with them. My daughter loved these larger classes - they were taught as flipped classrooms ( she had this in HS) and were very much discussion based. All of her professors knew her name and she spoke to them regularly outside of class. She had several amazing opportunities come from these relationships.