I think if you fly as much as I do, you'll find it useful. Wednesday, I am flying an MD-11 from PDX-CVG (not for long though) on DL, and specifically book this flight because of the laptop power (okay, mostly for the seat in business elite) and then Friday I am flying ATL-LAX...again I booked it because of the laptop power. Its nice to get 3+ hours of laptop use. DL's available was previously mentioned in this thread by OPUS 17