I have tried with my ball python, my dumeril's boa, and the ball python at the wildlife center I volunteer at to offer different types of hides at different points. I was attempting to get them to like the fake rock cave type ones before I gave in and got them the RBI ones. They'll use them, but there's a distinct difference in their acceptance and comfort with them vs the reptile basics hides. They love those ugly black boxes. If I were you, I'd just give in and shove some fake vines on top to make it look nicer. The only other thing that my ball python liked as well was a cardboard cracker box I used for him when he was a baby until he decided to soak them one day.

The RBI hides (and the cracker boxes) were the only ones out of all the ones I tried, including a couple homemade ones, that they moved into right away. The rest they just kind of stared at for a while or roamed around ignoring before giving in.