Fantastic. The curved element on the left of center balances the upright lines of the door on the right. I only wish some post-processing perspective correction or better still a view camera was used to correct the perspective distortion extending from the left lower side. The muted browns of the walls contrasts very well with the dark of the staircase and the green of the door. The lighting of course is just stunning, but another photograph with a darker mood would have been interesting, perhaps an evening shot instead of a morning day-time shot. The features in the distance make for an interesting extension of the central tension of the curved and straight edges.