Keep in mind the Whiteness will be a natural one achieved over time. Since I started pulling and noticed the whitening affect (the whitening action has now seemed to reach a point of maintenance) I have been paying attention when people mention that they have had their teeth whitened, or have used a home whitening kit.
Their teeth almost always look fake, unnaturally white; so do not expect to achieve that. I have got to think after having seen this that it cannot be good for them in the long run...