Just how strong is the law on enforcement of international arbitration?  Can a country enforce a foreign arbitral award that the country of origin has vacated?  See MGL Notes on Contracts, Numbers 2 and 3, concerning arbitration.
One reason often cited for choosing arbitration over court litigation is the enforceability of the resulting award;  foreign arbitration is generally considered to be more easily enforceable than the decision of a foreign court.  Just how firmly enforceable arbitral decisions are was explored recently in a U.S. Federal case to enforce an award made in a Mexican arbitration.  Corporación Mexicana de Matenimiento Integral, S. de R.L. de C.V.  v. Pemex-Exploración y Producción, No. 10 Civ. 206 (AKH), 2013 WL, 4517225 (S.D.N.Y. Aug. 23, 2013)