Luckily, 'The Great Imposter' turned out to be exactly that, exactly what it seemed it would be on paper. It was interesting and it was very entertaining, the latter being especially strong, those two being its main objectives and they were achieved. Won't say it was a masterpiece or classic cinema because it wasn't, not everything works, but like Curtis one cannot be too hard on 'The Great Imposter' with so much working in its favour. It knows what it wants to be, who to aim it at and shows a lot of effort without trying to bite more than it can chew or play it too safe.
Would have liked DeMura's motivations to have gone into depth more or properly explored/explained, this aspect felt underdeveloped.
Also didn't buy his reform, which felt rushed and too pat to me, but that's personal opinion.
On the other hand, 'The Great Imposter' looks attractive, especially in the photography, and is assuredly directed. The music is never intrusive, low-key, obvious or repetitive, it fits well and not hard at all to remember.
While the facts and subject are adapted loosely and the tone significantly more light-hearted compared to the biography, of which it is a loose adaptation of, the light-hearted wit is infectious, it doesn't get too camp or silly and those unfamiliar with the man and story before seeing the film will find themselves wanting to learn more. The story is crisply paced and while odd in places (in an appealing way) it doesn't get too hard to follow. The surgery scene is priceless and avoids the trap of falling into distaste, do agree though it is not a subject to be laughed or poked fun at usually.
Did worry as to whether Curtis would be able to handle multiple roles and whether he would pull it off, but didn't need to be. He does splendidly here, we have as much fun as he clearly did, and one can really see how much he grew as an actor from when he first started a decade or so before. Raymond Massey, Edmund O'Brien and Karl Malden are particularly note-worthy in support.
All in all, lots of fun. 8/10 Bethany Cox