I installed this on
Mazda 3

Review
I was recommended by friend how a Eibach Pro-Kit lower spring is very much better than stock spring.

The car feels a tiny bit more stiff than stock spring but it's still very comfortable. There is a lot less body roll; Corners and sprinted driving feels a lot more responsive.
Everyday driving, cruising around, is very comfortable. When you want to take on some corners, it's feels very stable.

I am very happy with everything and the new more aggressive look for my ride

What I like
Better handling, braking and responsiveness with no-more-fender-gap appearance

What I do not like
none

I installed this on
Mazda 3

Review
Coilovers give better performance in handling and high speed stability. However, you might need to crawl over humps and carpark ramps. Some coilovers become noisy after a few months.

Stock suspension of Mazda 3 is actually competent in handling, especially with chassis bars. Stock ride height clears almost every carpark hump.

Eibach Prokit is a good choice to lower the car, give better handling and yet still comfortable enough for slightly longer drive trips. Still have to slow down for humps.

What I like
Works with stock absorbers or KYB, no damage them even after long use.
Definite improvement in handling.
Acceptable comfort even with chassis bars installed

What I do not like
Price

Review
When I first got these installed I wanted a 3/4" drop, but it actually looked jacked up! The mechanic told me to let it settle and drive around for about a week. I did so, and it settled to the desired drop. That negative aside, I really liked how these springs improved my ride comfort. Plus, handling & responsiveness was better than before, and there's no more body roll when cornering. Overall I'm satisfied with these springs.

What I like
Improved handling; comfort increased; no more body roll when cornering

What I do not like
Takes a while to settle to the desired drop level, looks really jacked up before it does

Review
I had to replace my old worn out springs on my Mazda 3 and I got these because the mechanic and my significant other was recommending me these springs.

They were good! I no longer have the fear that my car will turn turtle whenever I do a u-turn and my car feels comfortable but 'sharper' at the same time. Also, my car is lower, which my husband likes (dunno why).

What I like
comfortable and the car feels easier to turn

What I do not like
none