I love CK diaries because of the format and features. I ordered the a4 because I thought it had a plastic cover but it didn't so returned it and bought this one. I thought the plastic cover from my previous CK a5 diary would fit but it's more chunky so didn't. They don't seem to have such pretty pages inside anymore and a shame they don't have the plastic covers for protection and hardiness. But they are cheaper here than at CK.
Also my refund and diary arrived quite quickly.