I've been driving on these springs for nearly 8 months now and they are certainly worth the money! This car had some very controlled body roll, and these springs remove almost all of that. You really feel yourself getting hugged by the TI Sport seats now when cornering!
The drop seems pretty close to the advertised 1.4 inches, and really does drop the Q4 down just right, the wheel gap is gone! If you don't like the tucked look, I recommend spacers as well. I get compliments on it a lot.
I find the ride height to be a lot more manageable than the Eibach Pro-kit (I've personally seen another Giulia on these to compare). That being said I daily drive my car. I'd tell you your days of pulling all the way forward in a parking spot are over , if you ever did it. Take your time over speed bumps and your bumpers shouldn't scrape.
Ride quality is definitely stiffer, but completely manageable. The real noticeable difference in ride quality is really when you hit bumps on one side of the car, or when the road dips more than a little bit- you'll feel that more now. I don't feel unsafe at all under rain, snow, and other conditions. I don't get any wheel well scrubbing while driving, even with a square 245mm setup - unless I hit a steep bump in reverse during full-lock (its not bad at all, girlfriend never notices!). I just treat the car with the extra care that lowered cars need. If you have been thinking about buying springs, then you won't regret these!