I have a Sager NP4780 and love it. I've never had to send it back for repairs so I personally don't know what that is like. I know if I had a business and had multiple lappys i would want a low down time and Sager is in California and the travel to and from for me i Florida would be at least a week. But the key thing is if the lappy never breaks it never has to be sent back.
