First, honest impression: At least on my phone (Android/Chromium) the typography and style of the website don't quite match that "high quality & expensive ingredients" vibe the parfums are supposed to convey. The banners (3 at once on the very first screen, one of them animated!), italic text, varying font sizes, and janky video header would be rather off-putting to me. Maybe it's also because I'm not a huge fan of flat designs, partially because I find they make it difficult to visually distinguish important and less important information, but also because I find them a bit… unrefined and inelegant. And, again, this is on mobile, so maybe on desktop it comes across differently.
Disclaimer: I'm not a designer (so please don't listen only to me and take everything with a grain of salt) but I did work as a frontend engineer for a luxury retailer for some time.