To answer everyone's questions:
How much lower?
Right now, it's little over 2" lowered than stock. We will see how much it will settle after some miles.
Ride Quality:
The spring rates on these Ford Edge springs are a good match for the CX-9. It's not harsh at all. The ride is just like stock at low speeds and over bumps. At speed, it feels more planted and connected than stock. When hustling thru the twisties, there's less body roll and significantly less nose dive under hard braking.
Overall, it's a good mod. I got the springs from Tire Rack for about 250ish shipped. I wasted a lot of time trying to get the rear springs out during the install. If I were to do it all over again, I would probably say about 2-3 hours with air tools.
One thing I learned during the install was how heavy these 20" wheels are. I will definitely be looking into a set of lighter 20" rims and tires. Enkei has a pretty nice RE30 looking rim in 20x9 @ 25 lbs. These new Enkeis with 274/45 Toyo ST-II will come in under 60lbs per wheel. Didn't get a chance to weight the stock wheels. But it's a safe say that the stock wheels with tires are over 70lbs.