Giant figures incompatible with the rest of anyone's 1/56 (28mm) collection, bit of a missed opportunity there. If they'd made them 1/56 (28mm) then I'd buy this.
You'll find yourself buying this very soon then.
I don't know if it's scale creep with other 28mm ranges, or these are just mislabeled, but they are very much the same size as what other people release as 28mm minis. See the photo above, where a BoS mini stands next to a Brother Vinni 28mm "not"-Vault Dweller.
I've seen and held some of the first release wave at SPIEL last year and I've played three games last week at a friend's who was lucky enough to get a couple of BoS minis for review. Those all were your regular size. (Well the human guys, obviously it's a little harder to tell whether a Super Mutant is in the same scale at a glance.)