Brand reputation and trust
Multiple consumers cite confidence in ISOI's brightening serum line as motivation for purchase, with some explicitly stating they repurchased to try new formulations from the brand.
Repurchase behavior
At least two consumers confirmed they bought a second unit after seeing positive results on the first purchase, indicating strong satisfaction-driven loyalty.
Value and bundle format
Consumers highlight the attractive 1+1 promotional pricing and the inclusion of both 35ml and 10ml sizes as key purchase drivers, with one reviewer noting excellent cost-performance ratio (CP value).
Recommendation and word-of-mouth
At least one buyer purchased based on friend recommendation, and the product appears frequently recommended in skincare communities.
Specific skin concerns
Consumers purchased specifically to address acne marks, pores, and overall skin brightening, indicating targeted problem-solving appeal.