So I took the plunge. I am now the proud owner of the entire Beatles catalog, remastered in stereo.
I haven't had nearly enough time to properly assess this thing, but I can tell you, the packaging is glorious. The outer box is understated and sturdy, with a magnet clasp, and the individual sleeves for each album are exactly right. The liner notes are informative without being sycophantic, and the discs themselves are designed like the vinyl records - Parlophone up through Sgt. Pepper, Apple Corps after that. They even get Magical Mystery Tour right: the version that eventually became canon is the U.S. release, so this reissue gets a Capitol Records design.
I've heard very little of it so far. I did listen to most of Abbey Road, and the sound quality is amazing. Details pop out now, and I heard things, even in minor songs like "Octopus' Garden," that I'd never heard before. The big improvement is in Paul McCartney's bass, which can now be enjoyed without straining your ears, and in Ringo Starr's drums, which are clean and separated.
I did, however, play some of Please Please Me, and it has convinced me to buy the mono box, when I have another $200 lying around. The stereo master of this album (and presumably the first four albums) was an afterthought - the mono mix was "the mix," and the stereo version simply put the instruments in one channel and the vocals in the other and called it good. The remastering team did not create new stereo masters for these albums, although George Martin did for Help! and Rubber Soul back in the '80s, thankfully. The not-quite-stereo mix of Please is somewhat disheartening, especially when the mono tracks ("Love Me Do" and "P.S. I Love You," which were never mixed in stereo) come in. They are bright and brilliant, exactly the way I want this album to sound.
But despite that, I am very happy so far with the box set. I spent $200 on music I already own, and yes, I understand how crazy that must seem to some people, but thus far, it was absolutely worth it. The best catalog in popular music now sounds renewed, rejuvenated, and ready to be discovered by generations yet to come. That's pretty awesome, if you think about it.