I know this has been talked about quite a bit on the forum, and I have done a search, but I would like to hear from forumites who have had this done. I realise there are two ways to have teeth whitened and am interested in the Zoom procedure, however, I would like to know if this is as effective as the moulds. Also how long does it last and do I need to make an appointment or can I just turn up. By searching the forum I think it is around $500US for Zoom but can anyone tell me the cost of the mould and gel way,thanks.