I want to get my teeth professionally whitened, my dentist recommended a nightly treatment where they make moulds of your teeth for the trays and you keep in overnight. It’s £250 which I’m fine with if it works but I’m sceptical as to whether I will even be able to put up with having the trays in my mouth all night! Never tried anything like this but I can foresee me finding them too uncomfortable which would be a complete waste of money! Has anyone used them and can comment on how good custom moulded trays are in the comfort stakes?