smoothes and adds shine [SEP] the brush makes my hair softer and shinier but not a huge difference to be honestthe massage function i did not really care for the vibration is pretty weak so i could not feel it even when i pressed the brush against my scalp but i bought this mainly for the ion function so i do not mindthe bristles are okay just like any other brush does not do a great job of detangling and pulls out some hair so i use my other detangling brush first then use this one for extra shine and smoothingit might also help with frizz but i am not very sure quality is good packaging is good too