Teeth whitening

I'm a big fan of a beautiful white smile. I tried different methods to achieve white teeth as i used to have a very ununiformed colour on my teeth. I've tried the laser process, to be honest i didn't like it. It was too tiresome, as it requires a couple of hours with your mouth open. The results didn't last long and not mentioning that is very expensive.
The other one I've tried was a gel whitening with a mouthpiece. You need to use it for at least 4 hours. I like this one, the only disvantadge i see is just a little bit pricey.
I found this website http://dramaticsmiles.com/products.htm where they promise a professional quality, much faster and cheaper. I'm honestly considering trying this one.
I don't use tooth paste whitening because they damage the enamel's colour. I don't recommend using it.

A quick tip for those who want to keep a white smile is drinking the liquids with a straw, like that the acids and the sugars from the drinks have less probabilities to damage the enamel.

You guys tell me what do you think about this subject, i wanna know your experiences and your point of views.