Dan asked me to look at this in its early stages. I felt it had a lot of potential, but I found it so hard to explain the theme. Let's see if I can do it without discombobulating everyone:

- Entries refer to other entries (1-Across is 12 DOWN, which points to the entry at 12-Down)
- The clue from one reference is the entry at the other reference
- Numbers are used, but as homophones in the crossing direction
- It's all tied together by 4WARDING ADDRESS
Still with me? Didn't think so.
Okay, 1-Down isn't 1SIES, but ONESIES. 2-Down is 2TORED = TUTORED. And 1-Across is clued as [Ten cents], which is the entry at 12-Down. And 12 DOWN is the entry at 1-Across.
Whew!
Plenty of puzzles have used cross-referencing, numbers in grids, homophones, even clues duped as entries — but the combination feels like something different and unique.
One point I made to Dan was that it would be a lot better if it weren't random entries that were duped from clue to entry. Why SEA COW, MACARENA, etc.? "Just because they fit" usually isn't a good enough rationale for me. It'd be orders of magnitude harder — maybe impossible — to work in entries that hint at the puzzle's theme (maybe DUPLICATION, CLONING, EVIL TWIN, etc.). So I like the balance he achieved, giving us some snazzier answers in TEN CENTS and MACARENA.
I liked a lot of the bonuses in the fill — TIME STAMP, STARTUP, TARANTINO, CREATINE. And Dan kept his short fill fairly smooth, a tough task given all the themers packed into the grid. SSRS and WIEN were cringe-y outliers, but ELL, NEV, PRES, SENS are mostly ignorable.
I would have liked more bonuses, as things like REANNEX, ENTERER, ALLOWED IN all felt neutral to negative, but that's tough to do given how much real estate the themers take up.
All in all, I appreciated the novelty of the solve. It felt different. I think different is a great thing for crosswords.