The only review I've seen (not counting those above), in today's Guardian, gives it 1 star and calls it 'A Nazi piece of work'.
'Having seen it once in Cannes earlier this year, and again for its UK release, I was struck afresh by how exasperatingly awful and trascendentally disappointing it is: a colossal, complacent, long-winded dud, a gigantic two-and-a-half-hour anti-climax, like a Quentin Tarantino film in form and mannerism but with the crucual element of genius mysteriously amputated.'
Was going to see it on Saturday night, might save the £20 and wait till it's reduced to a £5 on DVD.