I heard summer so hopefully like maybe one month max (yn)
Last I heard they were out in March...
As a mask, impossible to tell. Only a few people have tried them on, and those were only prototypes. If I were you, I'd stick to the available options rather hedging your bets with release dates and whatnot - it's turning out to be the next JRNY, or Duke Nukem, or something.
Empire E-Vents are good for large heads, quite a large mask with plenty of coverage