The highest compliment I can pay Quantum of Solace is I believed the conceit that it picks up twenty minutes after Casino Royale. Daniel Craig, Judi Dench, and the other returning actors are on their game. The overarching mission to uncover the organization behind Mr. White drives the action at the same breathless pace. I wouldn't mind if all Craig's Bond movies kept this continuity.
That said, Quantum of Solace doesn't make much of a mark on its own. Bond is so driven it's difficult not to see the new characters Camille and Agent Fields as plot devices. Mathieu Amalric as villain Dominic Greene unfortunately reminded me of a cross between Ioan Gruffudd and Paul Reubens. Director Marc Forster makes some odd stylistic choices (Intercutting Bond chasing down a traitor with a horse race? Intrusive location titles a la Fringe?), but these stick out because the rest of tone is maintained between the two movies.
Quantum of Solace won't disappoint those who enjoyed Casino Royale, neither will it convert those who didn't.