In reply to Gabe Oliver:
My Boostics are roughly one year old (and fairly abused) and the rubber at the heel has come away from the fabric, also the fabric around the ankle has ripped but doesn't really affect performance.
Mostly just wear and tear but I think the gap in the rubber at the heel is a bit of a design flaw. It gets caught on any sharpish heel hook and rips or pulled the shoe off when you weight it.
Probably won't buy these again though I loved them initially. Good toe box.