Do teeth whitening strips really work?

what are some good teeth whitening strips that you recommend?
--------------------
crest is good Add your Whitening Strips to your Shopping Basket. Add your Whitening Strips to your Shopping Basket. Purchase your favorite Whitening Strips at your local Retail Store. Open up the box or case and remove an upper and a lower Whitening Strip. Remove the Upper Strip from the protective packaging and apply the gooey side to the surface of your upper set of teeth. You are minutes away from a brighter smile. You are minutes away from a brighter smile. Remove the Lower Strip from the protective packaging and apply the gooey side to the surface of your lower set of teeth.
Source