Try the custom AI to help you find products that Reddit loves.
I haven't. Is this the same thing as their site? 160$ is mighty steep in price for something I don't know the effectiveness of. FWIW, I really like the openness of my metal ones but I'd definitely consider this if the anti pullout really does work.
Most first time chastity users start off with an imitation HolyTrainer V3 cage. It comes with different ring sizes so you can figure out which fits best, it's pretty comfortable, easy to clean, and for around $20 you won't feel bad about it ending up in a box somewhere if you decide it's not your thing.
If you do get it, start off with a ring that is tight enough to keep you from getting out of it, then after a few days, try the next size down. Choosing the right size ring is key to comfort.