I tried to make the switch to dermalogica from another similar brand. I like some of their other products so I thought it was time to try. But using the retinol testers for a week, my skin broke out quite badly. The flakiness was fine - I understand that is temporary but the acne was unlike I'd seen before. I would have a preferred an all-in-one anti-ageing hero cream over fussing with a buffer. Too fiddly and room for error.