Teeth Whitening

Watched a review on Plus White 5 Minute Speed Whitening Systems on MszJackieChu youtube channel. Not really happy with my teeth and can't afford to go to dentist to get them whiten so cheaper alternative, if it works that is. I found the kit at London Drugs for $15.99. I hope it works, I am using it ever night even though the box says twice a day but I don't think using it too much will be good for my teeth don't want them to become overly sensitive.