The IIHS just surveyed me on the DRCC, PCS, and LKA features on my Prius. I gave the system high marks, with the exception of sometimes the LKA does not work well in certain weather conditions, and on roads with faded lane markings. I did mention, and the surveyor wrote down, PriusChat is one of the resources I use to learn about the systems.
DRCC = Dynamic Radar Cruise Control PCS = Pre-Collision System LKA = Lane Keep Assist I believe ATP (Advanced Technology Package)-equipped Prius in Australia lack LKA though.