I got the cheap Chinese string retainer today. Took about six weeks, but I am actually pretty impressed with it. Good chrome. Does not *look* cheap. It has a smaller footprint than the Hipshot.
I am hoping to get away with using a traditional string retainer button, but if I need to hold down three strings I would not hesitate to use it. Not casting aspersions on the Hipshot at all, but for less $3.50 with shipping this is a great value, IMHO.