I tried on the CL Formentera Platform espadrilles last Spring at Saks. They were definite true to length, but I felt they were a bit too narrow for me so I passed.
They definitely showed major toe cleavage (which I like). I ended up purchasing Steven Maritime platform espadrilles, which definitely fit better, since they offer 1/2 sizes and CL didn't. The Steven shoes are nearly identical but show less toe cleavage if that is what you are looking for. I get a ton of use out of mine. I love them to pieces.
My sister bought a pair of knock-offs at Target about two weeks ago. They are a decent but not exact copy, but they were about $20. I just hope I don't start seeing them on every girl on the street.