54 year old woman just had 4 SecretDuo treatments q. 8 weeks face and neck. Main concern saggy underage skin and jowls. (also mild melasma). Significant positive difference, but keen for further improvement by noninvasive means. Advised to continue with the q.2 months (too much?) or better still to alternate with Dermapen4 and their MG-serums. I can't see from research what the Dermapen will add? There is little objective info available. Can you offer any opinion please?