hi posy ,
i use them they are much cheaper then getting them done at the salon
i got mine fro 60 pound from a local shop in luton called mias
goggle it and u will see loads of places do it local to you
they are soooo easy to put in you can style them , mine are human hair so i can striaghten and curl etc
and u can put as many pieces in as u wish , i got a full head (12 pieces) although i have found that they have got frayed (split end looking ) after i have had them for a few months , so check washing instructions !
i wash mine once a week
but would not be without them now , they make me feel so confident , u can get different lenghts too ! x