Garnier

Most owners are happy — only 2% of 73,900 Amazon ratings are 1–2★. These are the specific gripes worth weighing before you buy:

• heart_broken

  Heat is non-negotiable for results

  The product does essentially nothing without blow-drying or flat-ironing — buyers expecting a leave-in conditioning or air-dry benefit will be disappointed because the smoothing polymers only activate under heat and tension.

  — from top reviewer (Dr Dray)

  lightbulb If you air-dry, skip this entirely and look for a humidity-blocking leave-in cream instead.

• construction

  Signature Fructis scent is polarizing

  The fruity fragrance is strong and identical across the entire Garnier Fructis line, so if that scent irritates you or triggers headaches, you won't be able to ignore it — and there is no fragrance-free version of this spray.

  — from top reviewer (Dr Dray)

  lightbulb Dr Dray recommends the Paul Mitchell fragrance-free styling line as an alternative.

• emergency_share

  Glycerin can backfire in extreme humidity

  Glycerin is a humectant that draws moisture from the air, and in very high-humidity environments it can occasionally worsen frizz rather than tame it, despite the formula's balancing smoothing agents.

  — from top reviewer (Dr Dray)

  lightbulb In tropical or extreme humidity, layer over a silicone-based serum to create a stronger moisture barrier.