WotC hasn't let me down yet with 5E, short of Tasha's. Van Richten's was very good so I have some confidence I'll be happy with this purchase. At the least, new monsters and ship deck plans that I'll be able to use regardless of the quality of the writing.
Normally, I would have waited until I'd seen a flip-through of the book at least before deciding. But, I'd been eying B&G of other books (namely CoS), and not wanting to take the chance this would be sold out, put this on preorder at a hefty discount. It's a calculated bet, with the odds heavily in my favor.