I've now had mine on the car for a week of DD and two track days. So far I am very impressed. Shaikh will advise on spring rates and sway bars as well as matching bump stops to optimize handling balance and ride per your requirements. You are basically getting a suspension designed to work as a whole, rather than just a coilover.
The ride is excellent given how stiff the springs are. The damping has a fluidity to it that feels really very good, compliant and controlled at the same time. My goal was to have something as stiff as possible for the track, while still being comfortable enough to commute daily and I believe I have achieved that with springs set at ~1.9-2hz. Compared to the stock suspension it actually feels smoother at lower speeds. You can feel the bigger dips on the freeway more (the stock suspension was actually very good at these, but did have some low speed jiggle).
There is a lot of useful information on the fatcatmotorsports.com site, and I do believe what they say about setting these up to be fast, rather than to feel fast. On mountain roads I find I can go faster AND in more comfort than the stock suspension. My wife also agreed on how smooth the suspension felt on country roads.
On track I found the behavior very easy and predictable. More so than stock. Some of that is due to the optimized balance and alignment, but it can also be put down to the way the shocks absorb bumps and kerbs as well as quickly and smoothly settle into a turn.
I have driven koni yellows in the past, and these are a world apart. These will cost more than those, but you do get what you pay for. The only downside is the wait. Since this is a small shop, and they are custom built to order there is a long lead time, although Shaikh does provide updates whenever asked and I believe has taken steps to reduce the wait since I ordered mine.
I posted some details on balance here: New Sway Bar Option and Sway Bar Summary
Track video here: Track video
EDIT: just completed a 2nd weekend at the track and updated the above two threads. Really, really impressed with the complete setup now. I could not imagine anything better as I was driving it around on track. Perfectly balanced, grippy, stable, and confidence inspiring. When I went beyond the limit of grip it let go in a progressive and predictable manner allowing me to easily correct and keep moving with minimum drama. Hitting kerbs hard I could unstick the car, but it would settle again quickly with minimum fuss. Fun stuff