First of all, the delivery time was disappointing. It took 15 days for the product to arrive, which is considerably longer than most online purchases, which usually arrive within a few days.
Even though I measured my feet according to the instructions on the website, the shoes were too small.
The return process was also frustrating. A prepaid return shipping label is not provided, meaning the customer has to pay for the return themselves, whereas many other online retailers offer free returns.