Satsuma nursing pads are fantastic!
I selected them because they are organic and made with bamboo. I had read that for washable nursing pads bamboo is the most absorbent and non-irritating. I have had no skin/nipple irritation, and my skin does seem to be more sensitive than most, especially when there is a moist/dampness factor.
When I first saw them I thought that they looked kind of big, a larger circumference than I was expecting, but then after my first overnight trial I understood why. I have woken up and had the whole pad moist, but it has been spread over the entire area. I tried the disposable pads and I would wake up with a wet patch, usually around the nipple, and this is what I was worried about becoming irritated.