My friendly UPS lady showed up today bearing gifts
Got my brace installed in about 1.5hrs from opening the box to closing up shop thanks to Pre's write up... link:
http://www.sonicownersforum.com/forum/ddm-works/7659-ddmw-rear-brace-install-review.html
My initial impression is that the rear end follows the front of the car much better now. This is noticeable midway thru the turn and also if swerving back and forth down a straight road like a mad drunk.
Turn in also feels improved, the front tucks in alil better and the rear seems to know what the front is wanting to do and happily follows along the same line instead of taking a split second to get on page the drivers request to turn...... and of course body roll is minimized.
There's a few turns, pretty much 2 standard 90* turns back to back that I frequently take at ~28-34 mph hypermiling so I can stay in 6th gear (usually leaving CC on). I'm very familiar with them at speed and figured they'd be the best turns for comparative testing.
After going thru the "super spaced switchbacks" at just almost full cruising speed (literally CC on) I turned around and hit them again. The 1st turn I hit I can muster about 38mph thru the apex before the tires start to squeal, I mustered 42mph thru the apex and accelerated out on my 2nd pass with the Brace. The next turn has several nasty imperfections to avoid so I'm always slower/safer on it; 28-32mph is really cooking it thru the apex and I managed 32mph and again was accelerating out of the apex on my 2nd attempt with the brace......... For an initial attempt I was excited to see a speed improvement; this wasn't a bombing run to see how fast I could go, this was an attempt to hit the turn at speeds I was familiar with and see how the brace affected the behavior of the car. With the brace I was able to take the turn at a slightly higher speed at the same Comfort level as before on my 2nd run no less so there's a few more mph left once I get used to the new brace. And still body roll is reduced........ I'm optimistic for what further testing reveals.
I'll try and remember to chime in with my results after some more driving.
note: This is with Eibach lowering coils, results should be pretty close if not better on stock suspension but I feel it is still worth mentioning.
For the price, fairly easy install, and noticeable results this is definitely an item to put on the wish list. This is on my top 5 mods list for most tangible/beneficial results after Tune and springs (It may be better than springs, It's to late for me to know

).
I'd also like to give a shout out to Ivy at DDM for intercepting my package on short notice and getting it delivered to my new home, DDM has some very pleasant customer support!