I like the Oxnard M-20, have played a couple. it sounds and feels just like a Hoboken Guild M-20...except with a neck much closer to a baseball bat profile, and 1.75 nut.
They are not a traditional dovetail neck joint, it has an interlocking neck tenon system, similar to what USA Series Gibsons currently use, since 2008 (not custom shop Gibsons). this is an internal design change that does not effect the external size/shape/dimensions on the Guild (or Gibsons). They are still "set neck guitars" if you ask me, since a) there is glue involved, b) it is not designed to be simply swapped out by removing 4 screws and a back plate...anyway, it is nothing too fancy, but it's not supposed to be. It's got everything an M-20 should have, and nothing it doesnt. Also there has been some discussion about the finish. i *like* the finish on this guitar. i dont know what it is- but its not poly. and if it is, it is not the cheap heavy tacky stuff- this is a nice guitar!