Ask HN: Best smart alarm wristband/“WakeMake” replacement in 2015?

I was a big fan of the WakeMake and used it during summer school a few years ago. It was a lifesaver.

I had a Jawbone UP after that, but it was recalled.

I'm wondering what the best option is here for 2015. I see the Jawbone UP still has this feature but the UP3 wristband is backordered for 10-11 weeks. Is there something better that bundles a "smart alarm"? That's the only feature I care about