When I bought my new GHDs I got a full size bottle of the GHD thermal protector for damaged hair when I registered my product online.
I read the instructions on the bottle - as you do - which said I should spray moderately on my hair before blow drying, or spray on my hair directly before using straighteners. The first time I used the spray I believe I sprayed too much because it made my hair difficult to manage, as it started getting tangled and difficult to blow dry smoothly! However, I thought I should give it another go so the next time I washed my hair I sprayed a small amount on the top, and tried to concentrate more on the tips of m hair, which worked better.
When the right amount of spray is used on hair I think it does actually help, keeping hair smooth, glossy and prevents it from being damaged by too much heat, especially for people like me who expose their hair to heat on regular/daily basis!! The spray also smells great, not only does it protect my hair but it also leaves it smelling extra fresh and nice for a couple of days or so! GHD do recommend using the spray protector (step 2) in combination with their own shampoos and conditioners but it is not necessary to use an all GHD hair treatment, for me this works with any shampoo and conditioner I'm using.
So if you do expose your hair to the heat of a blow dryer and straightener and if you do so on daily basis it is quite worth using a protector. you only need to use small amounts on your hair so I don't think the bottle will finish quickly, I've had mine for almost 2 months now and it's still full!
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