I sit quite close to the speakers, which are positioned in the other two vertices of an equilateral triangle with sides of 1.7 metres, i.e., about 67 imperial inches. To hear the effect of sitting off axis, I moved about 0.5 metres (about 20 inches) to the left, to the right and behind the listening spot, respectively. For testing, I used the scene when the djinn escapes from the bottle in Three Thousand Years of Longing movie (Dolby Atmos soundtrack).
As it was written in the manual, the immersive experience was still very good at 0.5 metres off axis, but not so overwhelming as in the sweet spot. For music listening, at 20 inches to the left of the sweet spot, I heard the sounds from the left speaker predominantly.