https://www.isportstore.com/Badmint...ings/Li-Ning-NS30-White-Badminton-String.aspx Has anyone used this site to purchase NS-30 strings because its buy one get one free and im not sure if it's reliable or not and also I was directed to this site by Li-Ning http://www.li-ning-badminton.com/accessories/strings/li-ning-ns30-string-set-detail