I never see faked mono speedies in the area I live. (Lucky I guess) - I see lots of fake murakami bags though. I recommend the mono speedy - it's a great bag! I wouldn't buy my very first mono speedy used because it can be hard to figure the patina and dirt on handles unless you really know the seller. (ie., bright flash can make handles look better than they are). You can't go wrong with a mono speedy. It's a lovely bag. To me, the mini lin reminds me of a "grandmom bag," but that's just me. I would worry about the pilling and snagging since it's fabric too. Also, my SA tol me if you spill something on the fabric on the mini lin, it can be very hard to clean, especially if it is a colored spill. Baby wipes are wonderful on the canvas on the mono speedy and also on the handles if you catch the spill fairly quickly.
I absolutely love my mono speedy.