I bought a Misfit smartwatch from them in June 2018, in June 2019 it started playing up so I spoke to Misfit who said they would honour the warranty but I'd need a proof of purchase with a sales date on it (completely reasonable). I'd lost the original so I asked ASOS for a copy of the proof of purchase, which they duly emailed, it had no sales date so I contacted support again and asked for a proof of purchase with a sales date on, and they sent me the same email again. At this point I had a contact who'd helpfully given me her name Katie so I emailed her directly asking if I could just have a VAT invoice as I needed something with a sales date on it, rather than trying to be helpful Katie then asked me for my VAT registration number (which yes, I would need for a VAT invoice but seeing as their sales invoices don't seem to carry the date of the sale seemed my only alternative). Anyway, at this point I gave up, I was clearly never going to get what I'd asked for out of them and despite Misfit offering to repair my watch ASOS clearly wanted no part of it.
AVOID.