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Jedifar
Here is a dead honest review, tips and tricks from a Stage II and Sport owner that tracks the car a lot:
Wilwood is a known good brand of calipers - Not great - but good. Wilwood parts are easy to buy for replacements/rebuilds
The supplied caliper adapter brackets are ok quality. In a world where flyin miata makes beautiful brackets that are anodized with machined text, these are a little lack luster. The fact that we have to add shims to square the caliper is also not ideal. The brackets should have been made to properly square the caliper with the rotor.
IMO - the kit should come with custom brake hoses. Not adapt the OEM to fit. But that is one way RR keeps the cost down. Putting a positive spin on it, this keeps quick hose replacements easy to source.
Don't get them powder coated. The raw finish that willwood supplies is far superior and will look good longer. See the yellow caliper above. That is after 1 year of heavy use.
Customer service is amazing. I had a ton of questions.
The fact that this system uses the OEM performance package rotors means rotors will always be available and cheap.
Also, get the stage 2 kit unless your wheel offset holds you back. The stage 2 kit uses thicker pads which last longer.
Willwood pads are complete garbage from any performance standpoint. Swap them out for anything else.
Brake component life has drastically increased and brake performance (especially with the rear sport kit) is amazing.