Having an attorney look at it wouldn't hurt. There is one paragraph that contains the wording: "This Agreement constitutes the entire agreement between the parties ..." "No other prior or contemporaneous agreements, promises, representations, .... or any other undertakings whatsoever ... shall be deemed in any way to exist or to bind any of the parties ..." "Both parties acknowledge that they have not executed this Agreement in reliance on any such agreement, promise, representation, covenant, warranty, or undertaking."
Two things: Of course this is not true. Severance and subsidized insurance are contingent on our signing the AGR. Second, since by signing we are agreeing that there is no such promise, Sabre could conceivably decide not to pay the severance. Don't think that would happen, but they have an out if they wanted to take it.