This review is listed under a box set, but only applies to the second film.
This is the second film in the famous Andrzej Wajda War Trilogy, and for my money, the most accessible of the three. Set during the uprising in Warsaw in 1944, this 1956 film feels completely authentic. As the German troops close in on the Polish fighters, they retreat into the city's sewer system (the canals of the title), to escape the fighting, and traverse the city underground. The setting adds claustrophobia and tension, and the stress on the survivors is apparent.
The first part of the film introduces the various characters, and we see their foibles, and their loves and desires, before following them into the hellish fight that follows. If you enjoy this, you may well want to watch it again, in context with the other two films that form the trilogy. Happily, each one stands on its own merit, and they are not a serial, that has to be followed in order.