Discovered that Chop Chop charge more if you have booked through Treatwell. Understand why (commission they will have to pay) but goes against (or so I have always believed) the fact that businesses use Treatwell to top up their business i.e. fill empty appointment times with business they might not have have filled or use Treatwell because a business does have their own online system. This has put me off using Treatwell again to book.