It took me a few weeks to make up my mind between the ATIV and the Macbook Pro, as my new work laptop. I do a lot of image editing, so i needed something a bit more high-end.
Lots of reviews pulled me in either directions, but in the end i went with the ATIV, being more familiar with Windows than Mac OS. The trackpad is very accurate and the keyboard very smooth and comfortable. I will definitely recommend Samsung ATIV Book 9 laptop.