They should be of good quality. Its rated at a 1.6" drop, which is well within the D-spec operating range.
 
 
Yeah. They're good stuff. I'd put them up there with H-R or B+G, Goldlines, and others like that. 
 
 
I have that kit, and they're definitely worth the money. Esay install and easy adjustment.
 
 
 
zach, is yours a 1.6 drop on both front and rear?
 
 
I just installed the Tokico Suspension System inlcluding the D-Specs and springs and even I can't compare with other good brands I love them.  Ride goes from stiff to soft in seconds.  The Tokico springs are proggresive and they are doing a good job.  The system is rated for 1.4" drop but I just get 1" for now being installed two weeks ago.  Don't know if they will settle lower  by the time but let see what happens.   Hope this helps.
 
^^^Actually its 1.6". Mine sat a little higher for a few days until they were completely settled. Are you sure you only got a 1" drop? I took exact measurments before and after the install, and I had exactly a 1 5/8" drop. Also, I know what you mean, the progressive springs do an excellent job, but can be a wee bit stiff at times.
 
 
 
Yes,  just 1" for now.  I do have the before measurements and still the same.  I haven't run the car enough so let see if when I add miles to it, it goes lower or not.
 
V Dub wrote:zach, is yours a 1.6 drop on both front and rear?
H&R is rated at a 1.6/1.4 drop, but I never took the time to measure it. Here's a pic: