For me the first and most probably the only expansion, at least for the foreseeable future. Between Mediterranean, Pacific and this I think I chose right. Bringing along the Winter/Desert board I have the right combination with the base game to give me tons and tons of scenarios and gameplay to come.
Gimmick? Yes. Unnecessary for any other reason than visual flare? Yes. But despite all that - do I want to play Eastern Front on a real winter map? Double Yeah!!! I now own two, as a result of a lucky recent trade... Enter Overlord scenarios!