Couldn't decide on 3 or 4 stars, would do 3.5 if I could. IDK, rounded up to 4, I guess.
I'm only playing Besti 9 of the collection of games found within the launcher.
There's ponies, you're a human man/woman, you fuck them, they fuck each other, they fuck you, there's a lot of customization for the ponies and a little for your character. There's also a couple actual horses you can use to mount the ponies if you want.
The content isn't awful, the ponies are some of the better ones out there (though they're the "realistic horse pussy on a tiny cartoon pony" kind) and are a lot more expressive than normal because they're not simply recreations of the ones from the show and you control their pose and a bazillion little sliders and like 8 voices and all that, whatever.
There's like 10 maps, and each one has a bunch of preset locations for sex, though a good number of poses aren't limited to a specific place, like you can just lay down on the floor and access the poses for riding you.
It's a bit hard to nail down exactly what content is in the game outside of the obvious stuff and the animations, as there's also this long-term simulation aspect, where interacting with a pony often enough can make them go into heat, get pregnant and whatever, I don't know, I think there's other events that can trigger, like them getting bored and missing you, but it's hard to nail this stuff down because it's designed to be vague and confusing.
Something the game didn't have the last time I played was a cumflation system where they can fill up with cum, though annoyingly the cum just comes right back out if you cum into their pussy (works via ass/mouth though), and the cumflation shape itself isn't that great, so it's cool that they added in a fetish, but it's not implemented that well, I might turn that off if I continue to play.