Product review (3 stars): Gets the job done despite the shoddy material of the extension tube
My old dryer vent was did not have the extra extension tube, and my hose would constantly be coming unfastened especially during a storm with wind.  When I replaced my dryer, I decided to replace the vent as well, and chose this one.
Overall, I am pleased, but the man who installed my new dryer hesitated in installing the dryer hose to it because the aluminum extension is so light and flimsy, he thought it was plastic.  I ended up getting an extension at the hardware store that was truly aluminum and more sturdy to replace the flimsy portion.  I do like the levelor caged vent though and have not had issues with lint getting stuck to it that my previous one had.