I backed the Kickstarter and got the Rules Tome and boxed set. I can say that the production quality of the books is top-notch. The binding seems durable, and it lays mostly lays flat when open on the table. I’m not worried about the book falling apart like with some RPG books.
The page layouts are clear, and each section is on a single page, or a two-page spread. So no flipping around to see the rest of a spell description (or whatever). Everything you need, for every level is included. Unlike the original B/X, it’s not split into one book for levels 1-3, and another for levels 4+. Just one book that fits in your hand and doesn’t take up much table space.
Each of the classes is described in a two-page spread, with all the tables. So you don’t need to look up hit dice in one section, saving throws in another, languages in yet another, and so on. Class-specific rules, like Cleric’s turn undead ability, are described on the class page.
The language is pretty terse, with heavy use of bullet-points. “Keywords” for different abilities or effects are used consistently. I don’t recall any instances where I had to try to figure out what the text was trying to say when looking up a spell’s effect during a session (for example).
And finally, the author seems like a good dude. In addition to writing, he also did all the layout and art direction, and ran a very professional kickstarter campaign. Plenty of communication about the state of different rewards, and the few issues that came up.