While not from a Model 3, I think it is interesting to note the physical differences between a set of "$1000" coilovers and KW's. My brother just switched from ICS N1 to KW V1. The contrast is stark. Just look at the overall height and the spring height.
View attachment 701817
The problem with the aforementioned coilovers is that they typically utilize a lot of universal parts to put together something that fits the model they are going in to - it's the only way to get the cost down low enough. They tout features like "32-way adjustment", "carbon steel body", etc; but they are all typically similar builds and quality, and some of the parts may very well be sourced from the same factory but with a different finish.
Unfortunately, this never yields a great result. They may physically fit the car, but they were not specifically designed for the car. Post-install reviews are generally positive, but if you dig deeper there are almost always problems and issues crop up the longer they are on the vehicle. No one wants to spend $1k and then be unhappy with the result, so it's easy to convince yourself it must be good. However, the reality is typically unsatisfactory.
All I am trying to say is that the reason I support MPP's Coilovers is because they took the time to develop the coilovers properly with a top-tier manufacturer, put them on the road, put them on the track, made changes and adjustments as needed, and offer unparalleled post-sales support. They didn't just slap together something that fit and say "good to go".
And, here's my brothers reaction of the change.
View attachment 701829
Just thought I could offer some good outside perspective when comparing coilovers!