Classes are definitely challenging but if the available resources are used wisely, then those efforts can sometimes show through.
The professors challenge the student in an interesting way to make them want to engage in class. The curriculum is strictly based off your major which saves a lot of time from taking unnecessary classes. The workload is high, but manageable if time is taken to do it. There are many places to study and to receive help is needed.
Professors are truly passionate about what they teach, even if not all of them are the best at teaching, that's where TA's come in! For the most part the curriculum involved with getting a degree is very well-rounded with lots of opportunities for electives and other passions. Registration is pretty easy to manage, but frustrating as an underclassman because you probably won't get the time or professor or topic you wanted for a class very often. The workload is probably what most students were used to in high school, the tricky part is making sure you study and get your reading done with all of the distractions of NYC right outside your door. If you study hard and ask questions and do the reading you'll get a good grade, there's no special secret or trick; just try hard. There are tons of options to take part in research or special study programs too.