Good luck being lucky enough to buy this phone at the advertised $299 price. I bet most people will only have the option to find it on E-Bay or Craigslist for like $1,000
Well I am going out to buy me a One M8 at ATT today now. I like how developer friendly HTC has become again, great ROM's out there for the M8 I hear. Plus a couple friends have the M8 and are raving about insanely good battery life, rivaling the Note 3 almost. One guy had the Note 3 he said the M8 battery life is on par with that phone. Another buddy had the G2 for ATT, he also said the battery life on his M8 is pretty darn close to the G2, but that M8 with Sense 6 feels much faster and smoother.
I would have bought this One+ One, if they had it available for pre-order right now, or at least a concrete date as to when it will be in stock, and lead time, etc. But I think this phone will be a rare opportunity to find, and by the time there is healthy stock available in warehouse, the Nexus 6 won't be too far off, with new and better tech.