Product review (5 stars): Great unit...not going back to the traditional vents!
Great little product.  Saw it cheaper at a big box retailer, but ordered it from Amazon prior to seeing that sale.

Overall, the unit has worked great at blocking drafts.  Our connection faced the North, so the cold wind came sweeping into the dryer.  This unit solved that problem and our clothes are drying much faster now.

I did paint the unit.  It is recommended if you plan to have it on a side of the house exposed to sun.  A simple can of spray paint will do the trick.  One can was MORE than enough to cover the unit with two coats.

Unit installed easily.  All screws worked well.  One recommendation is to make sure to pre-drill your new holes.  I saw a lot of reviews on this with people saying it didn't "fit" on their house.  Watch the videos online for installation.  Heartland even has a 5-10 min. how to video.

Last, but not least, make sure to check your unit.  Since the unit vents "up" you will need to get in and hand scoop out any lint that made it past your dryer screen.  For me, it has been about a monthly check I do along with other outside fixtures.