The failure of any party hereto to enforce any right or remedy hereunder, or to promptly enforce any such right or remedy, shall not constitute a waiver thereof nor give rise to any estoppel against such party nor excuse any of the parties hereto from their respective obligations hereunder.  Any waiver of such right or remedy must be in writing and signed by the party to be bound.  This Guaranty is subject to enforcement at law or in equity, including actions for damages or specific performance.  Time is of the essence hereof.