I singed up, but no sign of any voucher for me :(
This "new" form factor of headphones reminds me of those cheesy bluetooth headsets people used to wear about 10 years ago. They were naff then and they are naff now. Sticking a logo on them doesn't change that. I like Xaomi stuff but I think I'll give this a miss. If you want good bang for your buck then maybe check out KZ ATE headphones. They are built like headphones that cost hundreds of pounds but at a fraction of the price. Read the reviews.
I got some of these last time they popped up on here. They're not amazing - The don't fit that snuggly, bit lacking in bass, and the right ear bud can get a bit clicky sometimes like the treble's too high. But, they're great for running, don't fall out, no wires to get caught on, and they charge while they're in the case. Not a day to day ear bud, but quite happy with them for the price and for just wearing at the gym and while out running.
Mine are rubbish
Yeah, i'm not impressed with mine tbh. Wish i hadn't bothered.