The opinions are different. Some photographers do not recommend coming in autumn, others prefer autumn. We were there in the summer. I've seen a lot of pictures by now - and to be honest: every season has something for itself! I think the right time of day is more important. The Rakotzbrücke picture looks best when the sun is not beating down from above. Side light is important, then the circular arc is best. Side lighting quickly creates the necessary depth in the image - this works in summer as well as in autumn.