Compared to a non-Android based other brand the Samsung tablet keyboard book-cover is very flimsy and only has one screen pitch. I have three Samsung tablet book covers for a variety of Galaxy S tablets and two of them have keys that sometimes don't work or sometimes tick and repeat. The missing 's' at the start of the word 'tick' in the previous sentence (I intended to write 'stick') is one of the common key failure cases on this tablet's book cover. They are poor quality and clearly cheaply made compared to an other brand's equivalent (which I have one example of that's solid, has two screen pitches and keypresses are consistently successful).
