My friend has been buying from Ministry of Retail for 3 years already and has always encouraged me to try it. I made my first purchase 2 weeks ago for 2 items. One item I absolutely loved, good fit, looked like the picture. The other item was too small even though I chose the right size, so I returned it.
In terms of refunds, they don't do this but offer store credits instead. But if I'm not wrong, the expiration date is 3 months so best not to forget about it. Customer service is pretty prompt, they reply to emails quite quickly.
They have so many items on their store, I'll definitely try buying from them again. My only caution would be check on the measurements per item, as many are free-size.