MGO undoubtedly has potential. It's a solid online action game, the Team Sneak and Sneak modes have a lot of promise, and the more Konami can tap the love people feel for the series, by adding familiar characters or environments through downloadable expansions, the stronger it will be. All the same, it's hard not to feel a slight sense of disappointment.
MGO is good, but anyone expecting an online experience as superb as that of Halo 3 or CoD4 - or Splinter Cell: Double Agent if you want another point of comparison - won't find it here quite yet. That verdict might not stand forever, but for now while this is a fine way to squeeze more value out of MGS4 if you have it, it's not a reason to buy it if you haven't done so already.