A coverage of 30X means that each individual base will be checked 30 TIMES to guarantee the sequence accuracy, and this will be done following highest standards in Industry. The disadvantage is that it is more expensive. The advantage is that gathering more information result in higher accuracy and complete analysis of your health predispositions at a CLINICAL LEVEL. Therefore, data can be used for a deep genetic analysis carried on with your Genetic counsellor. We do recommend this analysis when the individual is experiencing some adverse conditions.