Yes, PHD 5IN 1 does keep your hair looking shiny and smooth. I use it every time I blow dry my hair using a roundbrush. This will give you the best results and help to hide dry split ends. I have not had to use my flat iron at all since using this. If you air dry your hair you might not get the same result. I have wavy hair and if I air dry instead of blow dry with this my hair will still have a little bit of frizz to it.