We have several kinds of wool at home currently. We have the cream Kissaluvs cover seen a few paragraphs above, the brown EcoPosh Wool Cover directly above this paragraph, as well as some home-made wool soakers lovingly knitted by friends for little man.
To be totally honest, I really don't have a preference between the brands in terms of function, as they all work, and work well. I will say that the homemade knitted soakers are my favorite in terms of look. (Thank you Beth!)
If you have a heavy wetter at night, whether you use cloth or disposable diapers, I'd consider wool. It can really save on the amount of sheets, blankets, and sleepers you are constantly washing due to wetting through a diaper at night. Wool covers are a great option to keep your child dry but protect their skin from irritation at the same time.
Do you use wool covers at home? Would you consider it?