Eon was clean through the front and smooth overall. Zen is special. Rolls very nice and has a unique motion. I would agree that it does fill a void left by the Truth Pearl. It doesn't look like a typical pearl with a long/strong - hockey stick motion, but seems to roll more like a polished solid. Could be due to the S77R cover. It doesn't want to fly off of the dry, but still has a good amount of recovery for mistakes. Either way it is a solid performer and a smart choice to add to your bag.