I used my laptop for 1L year and then handwrote for 2L and 3L. My grades went up a ton when I started handwriting notes. First, I took way too many notes on my laptop that I never really ever went back and read. Second, because I'm a fast typer I basically took down most of what the prof said without having to think about it or synthesize it. Finally, even if I thought I was paying attention while I just quickly checked my email, I really wasn't. Even if I just diddles around on the internet for a few minutes, it honestly threw me off for most of the class.
Handwriting I found that I had to think about what the prof was saying in order to write it down - I couldn't just take dictation. I was also forced to pay attention. And, like the poster above said, I could format my handwritten notes much better - arrows, etc. (and I was tired of lugging around the laptop - MUCH niced with just a few spirals).
I also changed the way I took notes. I focused much more on writing down the questions the prof was asking and how to answer them. For example, in my first amendment class I'd write down the questions to aks when tackling a particular issue and then I'd write down some of the elements to look for. I also wrote down the hypos and how that changing things. This type of analysis helped.
In the end, try using computer, try writing in spirals - try it all and figure out what works for you. Don't feel like you have to do it one way or another just because everyone else does. If your school is like mine was, you'll generally see that 1Ls all use laptops and that many 3Ls don't.