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We try to stay away from product reviews as they normally turn into URL drops (which are against the TOS).
Whether or not you upgrade depends on how much you use the program. If you use it regularly, I would say upgrade to WPG2, as the new program does have some better features, including an option to slow down the reporting process to ease the load on the SEs.
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You may want to check this recent thread regarding WPG 2 [webmasterworld.com]