That was top of my checklist when I received mine on Friday. Premium Estate and mine did not have gaps as per the pictures, the aluminium is flush fitting so far as I can tell.
Just done my first bit of car cleaning and, in daylight, I can now see I DO have the same gap in the rear door sill area that others have commented on. On mine it's black trim on black paintwork with a black gap so near impossible to see other than in direct sunlight. Its also a slightly flimsy bit of trim so suggest you don't go poking around in there.
Apologies if my earlier comment might have led anyone to feel unnecessarily concerned, it does look to be a "feature".