Hi emz

I got a home kit from my dentist (i think it was called nitewhite) and was about $400. I did it every 2 days for about 2-3 weeks with the moulds that they make for you at the dentist (to perfectly fit your teeth).

And there was a huge difference!. I want to touch up but waiting until bub is born because it makes your teeth sensitive and if you oversupply in the mould so it is on your gum can irritate them a little.

Never had the zoom etc but my dentist suggested this way was better for results and cheaper.

Would do it again

In saying that DH bought a cheapy one off ebay like $20 and it was fierce!!! You coould only keep it on for 20minutes (mine you wore over night as you slept) and it worked too..

so who knows!