I fully support having everything in writing, in case things go sour.
Also, it sets out clearly what is expected of each party.
Many people will refuse to sign them, as they feel they are, or will not, be trusted.
They are not about Trust, they are more for clarity and communication.
These agreements should apply in ALL day to day occurances.
Friendships, Share Houses, Work Places, Relationships, and every other situation.
Genuine, Honest Humans will agree.
I feel having at least 6 copies, all signed by each party is best.
Each copy then becomes an original, with 3 per party retained and distributed to Trusted sources.