Satisfaction of performance

Background:Some businesses advertise, "Satisfaction guaranteed or your money back".A performance satisfaction clause in a contract can mean that one party does not have to pay or perform his or her duties under the contract unless fully satisfied with the other party's performance.Courts typically apply an objective, reasonable standard to resolve disputes arising from contracts with satisfaction clauses.

A.Would you advise GC to include a satisfaction clause on their contracts with cleaning clients?Why or why not?.