I actually disagree with that. I had about $2000 worth of Race Ramps and sold all of them except the 2-piece wheel cribs, which are a fantastic way to increase safety when used in conjunction with floor jacks. I have four problems with the ramps:
1. They take up a ton of space compared to Quickjacks.
2. You can't do any work that involves taking the wheels off.
3. Getting a car up on Race Ramps requires 2 people to be safe.
4. Ramps require a clean, flat surface (e.g. a garage floor) to prevent damage.
If you have a garage, get a lift. If you're unable to get a lift, Quickjacks are a great secondary option, because you can slide them together in the garage and drive over them. Costco has sales on them. I modified mine with PTFE skates and strong carry handles to make using and transporting them quieter and easier.