The website says that the term of the loan is ten years.  Also according to the website they can simply pay it off with savings, sell the house, or get another loan.  I don't know how old your clients are or what else is happening in their lives, but that cloud hanging over my head when that 10 year mark hits could be a little scary if I haven't won the lottery in the meantime.  This deal sounds like an option for folks, but to me it sounds like a last option.  I wish them luck in whatever they decide to do.