The only good policies they've pursued, e.g. granting more autonomy to the Kurds, have been initiated with the goal of ingratiating themselves to the EU.
From my perspective there's not much tangible evidence that Erdogan and Gul are different-in substance, at least-from Necmittin Erbaken and his colleagues in the Welfare/Virtue Party.
And the attempt will fail. Turkey has been teased with membership (first, in the EEC or Common Market, now the EU) since, hmm 1960? The current supposed stumbling block is Cyprus, but that's just the pretext to reject Turkish membership.