They call me mellow yellow: Does teeth whitening work?

Tried  Crest 3D Whitening Strips.  Once a day put the strips on upper and lower teeth.  Most treatment take about 45 minutes.  The strips just cover/whiten the teeth that show. You can used them about twice a year and they won't work on fake teeth (veneers, implants, etc.).  Before and after picture below.  Note that I have not used anything like this on my in the nearly 70 years I've been on this planet.  

Before:  

 

After (22 days after start):

I'd say it worked! Will be trying it again!