I have a HP laptop with a 18.5 inch screen (it's huge...) and I mostly scrap with it and use it for work - I work from home. We have a wireless router with an external network hard drive. I love that i can scrap everywhere, on the couch, at the table or even at night, in bed.
Before, I used to scrap on DH's desktop. The good thing is that it has a 24 inch screen but, it,s old and it's needs to be updated real badly. Also, it had a tera hard drive that blew up and that we have to change.