ONE YEAR LATER:
The ramps still work great. I hung a couple ping pong balls from the ceiling as "guides" when I drive up the ramp. I hung them about 5-6 feet apart and in line so that the driver's side hood pin/hold down lever lines up with them as I move up the ramp.
The ramps, despite the stops that I placed into the floors, still tend to walk "side to side" after about 6-8 trips up/down the ramp. So I occasionally reset them manually...no big deal.
Getting used to driving on and off without another set of eyes took some getting used to...LOL! A leap of faith...the ping pong balls get me within a safe proximity, so I don't sweat it any longer.
The bridges tend to "waddle" just a tad as you drive up and down, but they don't go anywhere and you can't feel it in the car. Just a slight 1/4" movement while they settle and move within their respective positions.
Other than that, it's saved me countless efforts with the floor jack and stands.
-Dean #747