So I just got the Idylle Ballade MM and used it today. When I tried it at home it was fine sitting on my bare shoulders, but when I wore a t-shirt, the straps kept slipping off! I was afraid of that since the straps are way out til almost the edge of the bag and I had asked the SA but she said the straps would not slip. Darnnnn and I love this bag too! Any advice/suggestions?? Oh and HAPPY NEW YEAR EVERYONE! Thank you!