Great if you want:
-Healthy BDSM with safewords
-Switch Dynamic
-Beautiful MMC/Rough and Tumble FMC
-Increasingly flirtatious arguments
-Forced proximity
Is that a goddamn switch dynamic I see? And one that doesn't end in 'switching was the problem, one of us just needs to be dom'? The fuck? Seriously though, I'm a switch myself and it's rare as rocking horse poop to find a novel even trying to represent me. And it's pretty dude x butch woman, so like... you had me at hello.
I really appreciate Blake for her flaws, in that all too often a FMC in one of these will be this perfect, sparkling pixie doll, and here Blake's struggle for self-acceptance is central to the conflict. She gets the traumatic backstory and the abusive behavior that would normally be reserved for the male love interest, and frankly, it was about time. If we can excuse MMCs being abusive because 'it's trauma' and 'he's hot tho' then let's see it from the other side, eh? Well we did, and it was glorious. That said, I do sort of wish Flea's carelessness had gotten a little more focus in the plot than what we got, perhaps at the cost of one of the smut scenes. He's not quite flawed enough, honestly. Otherwise, she's a crack shot, and the more dangerous of the two of them in a fight, which I really appreciate in a world of hypermasculine MMCs.
The worldbuilding in Gifts of Gold isn't incredible, but what details are there show a consistent level of thought and care put into how things work, e.g. Supernaturals need humans to get around the need to be invited into places that count as a 'home', and sometimes abandoned places are still 'home' to someone, somewhere. Someone yelling 'get out' is a problem, then, if you're having an argument. Devices that kill you if you kill the person wearing them are a powerful deterrant against killing them... most of the time. Etc. It's not perfect, but if you're the type of person to nitpick the clauses of a supernatural creature's weaknesses (I'm always like 'does a sewer pipe under our feet count as running water?'), then you'll probably appreciate this stuff.
Speaking of worldbuilding, I liked how that care was also put into the BDSM and its supernatural analogues (the 'ribbon contracts' and other stuff). Monsters are an analogue to kinksters hiding in plain sight, for example, but it doesn't slip into implying that all kinks are inherently monstrous/harmful, which shows the author thought about their metaphors. Consent is considered a minimum requirement for play here (repeat after me: 'IF IT ISN'T CONSENSUAL, IT ISN'T KINK') and the one big consent red flag I got from Blake and Flea's BDSM play turned out to be an intentionally dangerous habit that ends up backfiring on them badly. So, like, no complaints here. The author knows how to navigate topics of kink, and even how to knowingly depict and correct flawed understandings of kink. I know the bar is in hell but... good stuff.
As for the things I didn't like, I felt like the overall plot was quite sluggish, and would conveniently stop mattering at various points so that smut could happen. The smut itself was pretty good, and felt very 'fair' to my switch brain, but sometimes I'd think the smut was wrapping up, only to begin a new chapter and realize 'oh, right, they're still going'. I love smut, and most of this was quite sexy to me, but I probably would have been happier with one, maybe two, fewer scenes if it meant a tighter story. If the danger Blake was in 'not mattering' at times was actually the result of Flea's carelessly whimsical personality, and thus more of a direct flaw in his character that could come to a head later, I'd probably be praising this, but as it stands, the overall plot construction was a bit sloppy. Not an outright Roadtrip to Nowhere plot, but not great either.