I have this bag (in the Bordeaux / wine / burgundy color --- seems like ysl / saks / nm all call it something different!)
I've only used it once or twice but I'm happy with it for the price. It's pretty floppy / unstructured when empty, very lightweight.
It doesn't seem as smooth and scratchable as I thought it might be. As far as my other bags go, I'd say it's definitely going to hold up better than
mansur gavriel or the really smooth nappa leather bags (like the inside of my
prada double) but not as well as something like LV canvas or prada saffiano. You can see from the picture that the leather has a bit of texture to it. I'm new to YSL so can't really compare to their other bags.
In terms of quality I don't think it's anything more special than your average leather tote from
Nordstrom (just was looking for an example and the Madewell transport tote seems like a fair comparison). You're definitely paying for the name printed on the bag. I'm going to keep it though because this is my favorite fall color ever and it is lightweight and will go with everything.
Hope that and picture helps. let me know if you have other qs!