The performance of their kits is on par with their price point.
the shortcomings are in the caliper design and build quality. Additionally, they have very poor customer service and will fight every issues... and this goes to the top. I got in it pretty good with their VP of sales on my fuked up kit. It was a custom $8500 kit where all four calipers failed after 1500 miles.
The build quality is average at best and the company doesn’t stand behind their products.
performance isn’t really a major issue, Miatas don’t weight much.. guys prob did the kits more
for rotational mass