No white cast reputation
Many reviewers, especially those with deeper/melanin-rich skin tones, specifically bought it after hearing or experiencing that it leaves no white cast, unlike many Western sunscreens.
Convenience for reapplication
Buyers repeatedly cite wanting a mess-free, hands-free stick format for reapplying SPF during the day at work, school, gym, or travel.
Brand/ingredient trust from prior Round Lab products
Several reviewers already used the original Birch Juice liquid sunscreen or moisturizer and purchased the stick to extend their routine with a trusted brand and ingredient list (birch juice, niacinamide, peptides).
Sensitive skin / gentle formula
Reviewers with sensitive, allergy-prone, or reactive skin sought it out based on reputation for being fragrance-free and non-irritating, including buying it for family members with sensitive skin.
Gifting
Multiple reviews mention purchasing it as a gift for mothers, sisters, daughters, boyfriends, and husbands, often citing its easy, foolproof application as a selling point for gift recipients.