Free Wills Form

On the Internet you can find many firms offering free will forms but are they really doing you a favour .
What I am trying to say is do these free will forms come with a price ?
Will they stipulate that they have to be the executor of the will .Thereby guaranteeing money for them in the future and also [...]

You must nominate at least one person to be executor of your will who shall carry out the directions in your will and it is regular to use two executors. You could also nominate a substitutional person as a backup just in case any of the named executors is incapable of being executor of will [...]