Automotive Ramps

I was wondering if anyone on here has a set of wheels ramps like this:

http://www.easternaerospace.com/automotive/maintenance/Rhino_Ramp_in_Use.JPG

I'm lowered with eibach spring and don't want to hit. I also am wondering if this will give me enough to work under the car with enough elbow room for my grease monkey self.

Right now I just jack my car up and support it with jack stands.

Feedback please!

I have them,

They work fine on my car, on my old lowered Maxima, and on my friend's M3 lowered (kinda hits the front a bit, but still works)

I have those EXACT ramps. It may be close, but you should be able to make it. The car even not lowered is still lower at the bumper than the top of the ramps (they're about 7 or 8 inches tall). I do work on a friend's lowered eclipse, and the bumper just touches the ramps.
You will have a crapload of room, it is really roomy under there. although the ramps are much shorter than jack stands, your "jack point" is the bottom of the tire, which is a good six inches below the jack point on the chassy. I do all the work I can on ramps.