This foil truly does what it promises. It provides a clear view of the Sun, in which the Sun is white/yellowish and the sky adjacent to it is black.
Already on my first observation at 20x magnification I could see a spot. Bringing it up to 50x revealed the spot consisting of two smaller spots. When your eye accommodates to observing, finer aggregations of spots can be seen.
I recommend this foil to anyone because it gives your scope more functionality.
P.S. The foil actually does not look as bad as it seems on the picture above. It is really a silvery clean sheet.