I've read Household Gods. The good parts--the description of her daily
life on the fringes of the Roman Empire, the relationships between the
Roman characters--were very good. I almost didn't get to them, though,
being so aggravated by the idea that anyone would think that the Romans had
a more egalitarian culture than ours. Egad. And parts of the ending were
truly limp. I really hate it when people give away the ending, so I won't
get specific here, but the authors couldn't solve a major question so just
said, "Gee, we'll never know" and left it there. (I realize that life's
like that. We're talking about fiction here, which is under more strict
constraints.) The authors also don't seem to trust us to figure out their
messages without lots of help.
Even so, I'd recommend it for the parts that were well done. Parts of it
were just plain fun--haven't seen a deus ex machina that I could like in
quite some time.