The caddy is perfect, very good build quality: use with a Crucial M4 256GB in a MacBook Pro mid 2010. By cons I remove a star because the "Case" for the SuperDrive approaches the ridiculous, it's cheap and it's hard to wedge SuperDrive for it to reject the disks .... well short take caddy but avoid at all costs SuperDrive case (buy an external DVD burner samsung 30 instead).