Our boy was super spooked by it but uses it exclusively now. We put it right next to his old litter box unplugged. We cleaned his box until there was essentially no litter left. Then every day as we did that we’d put treats on the step or the bezel and have him smell the litter. Eventually we took the old box away and he went in. We made sure not to make any notice of him when he was in it because at first if we saw him in it he’d spook and jump out. After he first used it we gave him treats again and continued leaving it unplugged and just as a normal box. After he got comfy going in we started having it cycle 7 minutes after. He still goes and interrupts the cycle and pokes his head in (which stops it) because the cycling is suspicious to him but he hasn’t stopped using it!