Has anyone used this and does it work? [[www.amazon.co.uk/gp/aw/d/B005L8YVRO/ref=pd_aw_sbs_200_2?ie=UTF8&refRID=9PFPWRJ6M7B5TN318TKH&dpPl=1&dpID=81PchNqKfCL&tag=mumsnetforum-21]]