Quoting Monica Matuszak:" That's the same brand we're getting. This wasn't around when I had my son and I'm so happy to see it's ... [snip!] ... them seem to have standards on the thickness of the crib mattress. I'm hoping that a it will work with a standard crib mattress"
I'm sure it will. I heard that they're super sensitive so hopefully the thickness of the mattress wont be a big deal. You could always test it out by turning it on with no baby in the crib & see if it goes off. If it doesn't work I'm sure you could get your money refunded and find something that works for you. It's just totally worth it to me. If I wasn't getting one I'd be standing over her crib a million times a day to check on her breathing lol