it kinda does both, there are more mice but the more naturalized habitat gives them more places to hide that isnt your house, especially in the spring/summer fall, but winter too. I dont know, others get mice all the time anyway, we occasionally do, i dont know if it’s an improvement or not. I do know that a well sealed house in the woods with totally native habitat for acres (not mine sadly, lol) has far fewer pests than in any suburb house so i think there’s merit.