I use the Garman 18 USB on my laptop. I am too cheap to pay Hertz $9 per day for a Neverlost system that is out of date.
As previously stated above, I can control my laptop GPS better than any Neverlost system. I travel weekly and my laptop rides shotgun on every trip. I have to have an Igo power supply for the plane -- works in the car as well.
I program in my destinations before I leave or worst case in the air. I never get lost and I have a time calulation so I know when I have to leave one customer appointment to make it to the next appointment ON TIME.
On short trips, < 1 hour don't even plug the laptop into the power supply.
At $110 off the internet, Garmin can't be beat.