I don't recommend going from Juiced to Luna expecting better support. I have ordered parts - not bikes - from them and had a problem every time. On top of that, their support often gives attitude when you do have a problem.
Up until now "Luna" bikes were just stock commercial bikes with a BBSHD (or other mid drive) installed and sometimes some parts swapped out. Nothing's wrong with this (Lectric Cycles does this too with some of their line), but the experience doesn't necessarily translate to the challenges of overseas manufacturing (witness all the problems Tora et al have had). The Apex (which I'll admit looks amazing) has a bespoke carbon frame and battery, lots of customization, a drive Luna has never shipped before.. Is this starting to sound familiar? Add on top of the fact that, to my knowledge, Luna has never shipped anything other than a bolt-on conversion. Juiced is running into problems and they've shipped hundreds of bikes (and aren't embarrassed to admit they're iterating as they go).
If this ships, it'll be an amazing bike, and I hope they succeed - a powerful torque-sensing mid drive was what I really wanted in the first place - but I simply don't trust the company that once shipped me a used/visibly damaged sub-$100 part as a new part with their first foray into custom-manufactured carbon fiber. And a warranty is an add-on!
Incidentally, it's likely torque sensing mid drives will be come more common (And available in DIY) soon - Lectric Cycles had one at Interbike over a year ago:
https://electricbikereview.com/forums/threads/e-rad-lectric-cycles-at-interbike-2016.8897/. I would keep an eye on their site (their E-RAD motors are just custom spec BBSHD - they deal with Bafang a lot too).