<p>Depends on what classes, as a physics and engineer student, I only brought my notebook to my physics recitation to do the homework (its online). I hardly brought it to class since I can write faster and keep my notes more organized. Some people brought them to class, but many didn’t. You really can’t use a notebook to take notes in a calculus class. So some do, but I would not say more than 50%, then again I was in classes where a notebook wasn’t needed. I also found that bringing my notebook would just be a distraction since the internet is accessible.</p>
<p>I feel most professors either don’t care or would prefer one to not bring a notebook to class. While they can be powerful resources, they can also be powerful distractions which is why I never brought it to my classes. </p>
<p>As for portability, I have a 15 but would not mind a 17. 13 is too small for me, but I’m happy with my 15. It is a Dell XPS and so far its been good. I have had to reformat the HDD 2x but other than that nothing major. If I had the chance again I might go with a Mac, but thats only cause they have elegant look to them.</p>