I struggled a bit with that read myself. It uses a lot of classic gothic tropes and was a bit slow moving for me, (think Castle of Otranto) but my friend absolutely loved it.
Now that I'm in the last 100 pages, I'm more engaged--even if I'm mostly just rooting for Noemí to burn High Place to the ground. I definitely don't think it's a bad read, but I agree the first half took some determination.