Jack stands are much more versatile.
What good will a ramp do you if you need to remove the wheels?
That said, ramps can be convenient for rapid setup.
I'll use four ramps get the entire car up for exhaust work, and such. This also makes things level for tranny fills, etc...
Four ramps? How, you say? Well, I never actually drive up the ramps. I simply jack up one end, and set it down on the ramps. Why? As mentioned, I have found that most ramps are too steep to clear, particularly in the front. Also, driving up the ramps is always unnerving.
I like the home-built wooden ramp idea, since once could design in a more gradual slope, and no flex. The metal ones do tend to nest for tight storage, however...
Still longing for a real lift...
1986 300E 5-Speed 240k mi.