Here's my review of the Dash Mini Griddle vs. Road Pro Skillet for solo truck camping.
The Dash Mini (120v 350 watt) took about 10 minutes (including 5 minute heat up) to cook the Ham, Egg & Cheese Bagel and the Road Pro (12v 180 watt) took 25 minutes (including 10 minute heat up).
If I only took one of these camping, it would have to be the Road Pro. It's slower, but it can also heat up soup and boil water, and the Dash Mini can't. The Road Pro will also work in any vehicle with a 12v cigarette outlet.
That being said, the Dash Mini is only $12 where the Road Pro is $41. I'm keeping both of them.