I went to my dentist to have my teeth whitened and I have never seen such dramatic results. My dentist uses Opalessence (sp?), which is the highest % available. My mum got zoom whitening and it was good, but not as good as mine. I have tried home stuff before and the results were just crappy, waste of money. I even used Vani-T whitening wand and it didnt do a thing.
I do wanna say something though...... I understand you want your teeth whitened for your wedding as did I and it was so important to me and I wouldnt do any different or talk u out of it. Although beware your teeth will become highly sensitive and in my case my teeth have pretty much no enamel left so I am having to get fillings more and its like my teeth have no protection. I have to rinse my mouth after having coffee or any coloured or sugary foods. Sorry to put a dampener on it but I wish somebody warned me.