I got my Kerv ring a few weeks back. Actually, I got it a few months back but initially it was the wrong size, then they sent the same size, and finally I got the ring. It works. And it works most of the time. It can be a bit hit and miss at times. But my current success rate is 80% roughly.

After waiting months and months for a ring that we'd been promised updates "shortly...next few weeks" etc for, I decided to order the Kerv Ring.

I was really really looking forward to a NFC ring, but the fact that the pre-order link has been removed from the home page, and my account is no longer available despite the fact that my browser has the details saved, I gave up.

I'll let you know how the Kerv ring goes! I atleast know that it'll arrive in a fortnight now :D