0 Crest 3D White Professional Effects Whitestrips

Have you tried any whitening products? If You're Not Whitening, You're Yellowing. I have a couple times and never really stuck with them to see an end result. 
Over the past 3 weeks or so, I've been using the Crest 3D White Professional Effects Whitestrips courtesy of Influenster.  There are a number of different whitestrips kits available. This one in particular, is a level 4 (out of 5) on the whitening power scale.  It contains 20 treatments designed to be used daily. 

The treatments in the package are small, individually wrapped packages. Each contains an upper strip and a lower strip. This makes it convenient to keep it in your purse or somewhere discreet. The strips apply to your teeth very easily. I always want to mess with them while they are in my mouth and I produce a ton of saliva which does seep into the edges of the strips but that doesn't seem to effect the performance at all. 
Now, I am further than the 20 days and still have some left, because I have sensitivity issues with them. It says in the literature, that if you have any sensitivity or discomfort to stop usage for 2-3 days then resume usage. I did experience that. It seemed like my teeth and gums were super sensitive to everything the next morning after using them, so I had to tone it down to using a treatment every few days instead of every day. The literature also assures that it is temporary and not harmful if you experience that. 

Not the greatest pictures, but here are my before and after pics. Honestly, there's not a huge difference in my case but even though it's slight, I am glad that I got the opportunity to try it out.

Disclaimer: I was provided a sample of this product for review through Influenster. No other compensation was provided. The opinions here are my own.