I've taken Calculus and Biology classes at NSC during the summer - pretty intense 6-week semester. I've taken a Biology class at CSN but I had to drop it because the instructor gave me the "this is just my part-time job and I don't really care" vibe. And I've heard the same complaint from friends that went there.
The instructors at NSC will push you to try harder. Sure, it seems like a lot of work and it can be difficult but in the end, you'll be glad the instructors teach the way they do. You'll retain information for years...it's not just about memorizing a bunch of things but more thinking and applying knowledge.
The instructors seem tough and some of them have made people cry in class or get really upset/ offended. You're here to learn, think and work hard. If you're lazy and not self-motivated, this is not the school for you.
They're expanding and adding more buildings. When I first went here, it was only the Dawson building and the LAS building was being built. Now, they have the NSE building and a student center.
Campus security is also very helpful unlike other schools' who's busy issuing parking tickets and offers zero assistance when you need them! I was on campus at 5am to avoid EDC traffic and I had an exam. I was reading my notes in the parking lot and it was pretty dark. Campus security let me in the building and my room so I could study. That was very nice.