I love mine, I have the 12,000 lb model, great for oil changes and getting under a car fast and safely.
When I go up the ramps with my Jeep, I put it in 4WD Low position, take my foot off the brake and up it goes. No need to give it gas, it has enough power in 4L to go right up the ramps.
I'll say it again, best $35 investment for car repairs I've made in years.