It’s FANTASTIC, LEMME TELL YOU.
In the mod itself there are no vanilla mobs, so you can run around without worrying about Creepers and the like.
That’s not saying that there aren’t any hostile mobs in the game, hells no.
I cannot tell you how terrified I am of Arboks and Fearows - one of which will attack you on sight, and the other of which will SWOOP DOWN FROM THE HEAVENS AND FUCK YOU UP.
This is the best thing, lemme tell you.
Before the addition of randomly-spawing PokeCenters, it was stupidly difficult to get started in-game (because of guerrilla warfare birds and snakes). It’s not too terrible anymore but it’s still kindof annoying to have to run to a PokeCenter every five minutes because NOTHING WILL LEAVE YOU AND YOUR LV.5 STARTER ALONE.