Its a 2700lb car with 12" rotors and twin piston calipers. It has plenty of braking, even for track duty. OEM pads are not suitable for track use, but with the right pads, the brake system is plenty adequate.
With good tires it'll stop from 60mph to 0 in about 106ft, which is pretty good for a street car. With the Prius tires it'll do it in about 110ft.
About the only complaint I've heard from actual owners of the car is that there is a bit of firewall flex, softening the pedal feel under hard braking. Several aftermarket vendors already offer solutions for under $100 however.
About the only complaint I have after 1200 miles is that the paint is soft and scratches easily, and the interior panels rattle. For a Japanese car, I expected better from the interior.
That said, this car vibrates so much from the Power-train and suspension, that making it 100% rattle free probably wasn't possible without adding some weight, and the light weight is what makes this car fun.
Also, in cold weather it shifts like [censored]. Second gear is hard to get into, and third gear grinds. A drain and fill with better trans fluid is definitely on my list of things to do.