Besides the mediocre chatbot model that Candy ai comes with, I think their standout feature is the "Live Action" feature.
It basically is a texting simulator where you have to build up "exp" to unlock more of the character's "actions" such as kissing/undressing all the way up to various sexual positions. The feature is interesting, but you get paywalled after 7 messages, which is when you unlock "Kissing (Another girl)". Seems like the site really wants your money.
Ignore the sound on the video, I was listening to Columbina xd