I have several in few sizes. I did not understand when tPF girls advised me to take Le Pliage nylon tote ????? and carry in my YSL downtown in case of rain. I took a matching colour to YSL tote and kept it inside....however, Le pliage has such a nice rich textured nylon and looks so pretty in every colour they make - I ended up travelling with my YSL constantly in le Pliage, it was bad weather in Paris and all my photos from a trip have Le Pliage. Colour palette in real life is great, sophisticated colours - orange for example, is such a beautiful dark burnt orange, mauve is a subtle purple, so gentle. Colours are what makes it classy - chocolate,taupe, navy...all of them are very classy colours comparing to cheap nylon bags. Handles are great on shoulder, or smaller hand held.
since then, I bought quite a few colours in few sizes, including graphite large travel tote, so my usual carry-on luggage (which is extra large gray suede Mulberry large bays) can fit easily in it and can be thrown on the floor of the airplane with no fear. At last I can enjoy my bags being protected with fine nylon, durable, classy covers.
That is how I use le Pliage, I either carry it folded in my leather bag, or when the weather changes in a minute, I just stash my leaather bag in le Pliage and it is just a nice cover with great handles (because my bag is inside, all is still structured. I anyway use purse organizers all the time ("Pouchee"), so mess would not be an issue