In its X7, Cowon has produced a video player with the ability to rival Apple's finest. It's easy to use, looks good and sounds superb Tested at £. Find helpful customer reviews and review ratings for COWON X7 GB MP3 Player (Black) at Read honest and unbiased product reviews from. Cowon X7 reviews, pros and cons. Liked: Plenty of storage space. Great audio quality. Disliked: Thick, bulky design.