The vanilla suede scent is warm without being overpowering, and it actually lasted a solid month before I noticed it fading. I've got one in the bathroom and one by the litter box, and neither room smells like a pet anymore.
Ellie★★★★★
I plugged this into the hallway outlet near the litter box and the whole entryway stays fresh for weeks instead of fading after a few days like my old refills did. The vanilla suede is subtle enough that it doesn't overwhelm the kitchen, and two refills lasted me almost two months.
Sebastian★★★★☆
The vanilla suede smells warm without being overly sweet, and it fills my living room within a day of plugging it in. Only complaint is the first refill burned through faster than the 30-day claim, but the second one's holding up fine.