This is an Interesting little video that I found on the net. Created by YouTube user TheGarchaHD, it walks you through the User Interface of the Tizen based Samsung Z1 and shows you some of the features of the Tizen 2.3 Operating System.
"...you can see how smooth it is. This OS is amazingly fast and smooth" - Simrandeep Singh Garcha
Check out the vid below, after all, seeing is believing: