Product review (5 stars): What a Difference
Our laundry dryer vent was an old aluminum flap that just wouldn't shut and cold air was the norm in our laundry room.  We read all the reviews on this product and decided that most of the complaints were due to folks not wanting to do a little install work.  We purchased our Heartland dryer vent, painted it, installed it (with a little tweak) and we couldn't be more surprised at how the laundry room is now warmer, an additional bonus is that it's quieter - no more outside noise.
For us, we simply pulled off the old flap, did some insulating around the existing area since the stucco hole was a little wider than the vent tube, and our 55 year old house has no insulation in the walls.  We also had slightly uneven stucco so to attempt to make the new vent as secure as it could be, we took rubber window insulation and placed that around the base of the unit where it connects to the house, screwed it in place, and used paintable caulking to further seal the connection. In total, the install project might have taken 45 minutes.  Well worth the level of comfort we now enjoy.
For those who are not savy with a screwdriver, you might want to stear clear.  But for those who have a bit of comon sense, this will certainly improve the level of comfort in your laundry room.