I have a Hoya, I forget the exact name I think it was "carnivosa" but there may have been something like "exotica" in there too. Anyways, I got that for my first Cham back in January, so it's been in there for several months now, holding up like a champ. I get a few brown edges every so often, but usually its cause i forgot to water the soil. (after my first Cham died I could barely go near the cage for about a week and a half, so he plants had no water or light, and this one actually held up the best out of all of them.)
When I originally got it, it was actually trained around an arch (like a handle on a basket kind of shape) but when I replaced the soil the arch pegs wouldn't stay, so i just unwound it and it was nice long vines, so I just wrapped these plant vines along the chameleon's walkway ropes and it looked awesome.
The leaves do hold the water very well when they're faced flat, but they also have a bit of that rubbery/waxy kind of texture, so it will run off a little easier too, than say my hibiscus, if the leaf is more sideways.
Also one more thing, I have found my little guy eats his hibiscus leaves, but he's never eaten any of the Hoya. Don't know if that's just the positioning of the plants, or if it's the leaf textures or what, but just something to note.
Anyways, so yeah, just wanted to put my two cents in, I have one and so far so good.