Product review (4 stars): Install could have went better
Just installed it into stucco.  Needed to go out and get a masonry bit, masonry screws, masonry anchors, and sealant (because the manual says so and the screws it comes with suck).  Face plate was bigger than my last exhaust (aluminum lid that flapped open, much like this one: http://www.amazon.com/Deflecto-GVH4-4-Inch-Galvanized-Vent/dp/B003YCDMJC/ref=sr_1_50?ie=UTF8&qid=1370208935&sr=8-50&keywords=dryer+vent+cover which was impossible to clean because it was so low to the ground when it was installed).  I didn't feel like putting the screws into the top near the cap, seems like it should hold up fine in concrete.  Hope the lid doesn't blow off in a storm, seems like it could.

I think the instruction manual says how big the faceplate and the pipe coming in need to be (6.5" and 4" respectively).  I thought it ran small on the intake, though it could be because i just tore up the last exhaust and there was a bit of a bump where the old exhaust had been.

Instruction manual can be found on their website along with replacment parts: heartlandnatural.com
http://qo9x6.3gaeb.servertrust.com/v/vspfiles/assets/images/dv-install.pdf