"Rope", in one apparent take, is technically impressive.

There are often plot anomalies, as how the hero Scottie knows about 'the Carlotta portrait'& its connection to Madeleine in "Vertigo"; or why the tennis player didn't just lose the match that his life depended on ending quickly in "Strangers on a Train": but Hitchcock's masterly narrative technique usually carries one over these, so that one only notices them on a third or fourth viewing (and then only if you are the 'legendary pedant' I was once described as by a poster friend on another online forum).

~Michael~