Made two large orders very recently of which I returned about half the items.
The first order was fine, not quick, but not impossibly slow.
The second came in two parts. foolishly because i was trying to be organised, I requested the return for a few bits in the first half before the second part arrived. Nearly sent it off. Thank goodness I didn't.
Uniqlo website refused to allow the second lot to be returned. I was happy to pay for a second label, even paying for two labels its cheaper than travelling to a uniqlo. Customer services wanted me to courier the items back at my own expense. Then they wanted me to return them to store and exchange them. Given I never intended on keeping both, I was planning on one or the the other but neither fit, I wasn't impressed. I felt i was made to justify why i wanted to return the items. I asked to speak to a manager.
Then then said I could just attach the second parcel to the first and make a note on the outside. The website has authorised the full return, I haven't received it yet but its not been long, so it may still work out OK. But it was way harder than it should have been.
Stuff I kept is very nice though