These non stick tins are the best because the cake do not stick, so it burns far less easily than with traditional cooking materials.It's great to use for cooking & washing & dry as well. Non stick is also terrific for inexperienced cooks or busy cooks wit many distractions.Perfect as it can withstand high temperatures and not release non toxic chemicals.Scratch resistant, the solid non stick coating not only makes the food makes the cookware scratch resistant.
There is uniform distribution of heat, uniform heat is extremely important to cook food faster and hence save gas or fuel. It evenly distributes heat so that food is cooked faster than regular cookware or bake ware. 
Round tins have spouts to conveniently pour out cakes. Their shape prevents the batter from running over ad allows for even cooking in the oven.