I love these shades.  They are on my screen porch and provide a lot more privacy than I thought while still allowing air in, and I can still see out quite a bit.  That said, Wayfair sent me the wrong shade with a pull string on them rather than the crank handle for one of the shades - THREE TIMES!  Lots of returns, lots of hassle.  I ended up having to go to Home Depot to order the correct matching shade with the same hardware from the manufacturer, so I may have been better off just to buy it from them in the first place.

Pros: Allows privacy while still allowing ventilation
Cons: Tremendous hassle to get the last shade to match the other two.