I shifted from Monero to USDT (Polygon) and after some time, it failed. I accidentally closed the browser window before I was prompted to enter the refund address. However, when I contacted support the next day, they quickly responded, pointed out the issue, and promptly refunded the money. So, my experience with the customer support was good. Overall, the service is pretty good, but they have relatively high minimum transaction amounts, which makes it only suitable for larger transactions.