I switched to one from pc based laptops last year. What do you want to know?
As a college student, I love:
That I don't have to plug in for a 4 hour lecture (I get 6-7.5 hours per charge, depending on what I'm doing)
Some of the software I use is cheaper for Mac (MS Office for students was 65 bucks at the college book store)
It has less 'hiccups' than my pcs did.
I've got a 13" Macbook Pro and it can run windows and Mac o/s's, which I why I got it in the first place, but I've only encountered one software program that we use in my major that doesn't come for Mac and everything I've created in Adobe for Mac has worked on PCs, so it's not an issue.
If you wait until June to purchase, they usually do a special where you get a free (actually a rebate) iTouch or iPod with your purchase. That's when I bought mine, and my son was very happy to get an iTouch out of the deal.