After 30 days of usage, part of the bottom rubber sole started peeling off.  Since I had the product for more than 30 days, it was no longer covered by Amazon's exchange policy.  I had to buy heavy duty shoe glue to repair the sole myself.  I hope that this is an isolated event as the other Propet sneakers I have bought seem to be holding up so far.  It is also hard to find 5E sized shoes.