Just got a slide keyboard for my iPhone 4S. This have 4 rows of keys and I^m writing with it right now. Terrible experience so far. This keyboard is really thin which doesn*t seem as a plus. And noticed that there should be enough empty space left between the upper row and the phones body. Noticing that it is difficult to press the buttons cause the finger tip hit the phone every time. This was the thing I wanted to share.