I just got the tie-bright mustang, but I have six or seven of Vixskin's products. I don't do much to care for them other than warm soapy baths after play and they stand next to or lie down next to each other, I'm paranoid about letting them sit on top of each other but as long as they aren't in extreme heat it's usually okay.
The only thing I have noticed with the Vixskin materials is the sponge-like outer layer is easy to leave teeth marks in, so if you're playing around with oral insertions try not to bite it or scrape your teeth along it. You can rub out a lot of the surface marks, but if you bite really hard, there will be noticeable marks left. You'll tell yourself it's okay at first, and then you'll really wish you'd never bitten down. Just speaking from experience.
Dual-density toys feel really different from solid silicones so you'll probably really enjoy that aspect!