This simple little mat works really well. It uses batteries , 6 in all. I am very happy it is not a plug in electronic device since that would be really bad for health. My seven year old granddaughter helped me review this product. We put it under the twin bed mattress and tried every setting. She liked the vibration and music. I liked the heartbeat the best. We tried out the manual setting, then put the device on baby cry mode. My granddaughter whimpered softly and the settings kicked in immediately. she was soon asking to sleep over and to go to bed now! My grown daughter is going to try it next, as she has insomnia .

I have 7.5-month-old twins. One is an amazing sleeper and one is not. I’ve used theMunchkin Lulla-Vibe Vibrating Mattress Padwith both of them, which is similar to this, but only vibrates (and not with a remote). It does well for my good sleeper and sometimes my bad sleeper, but the fact that I have to walk into the room and up to his crib makes him see me and want me to pick him up. I really like the fact that I can either put this on auto (cry) or manual and turn it on from my own bed across the hall. The cry setting is actually both noise and motion sensitive. My son can flip in the crib (he moves around a lot) and it turns on or he or my daughter (a few feet away) can cry and it will turn on.While this does not make my son go back to sleep, it does keep him from going full-on ballistic. The heartbeat is probably the best part of it. It sounds almost like that car that has its bass cranked up and you are driving next to it and can feel it. It is strong and loud even on the lowest setting, but it is very “soothing.” It makes me want to go to sleep. I think the heartbeat sound calms my son for long enough that I can get him a bottle and get back to him before he is defcon 5 and wakes the other kids (the 2-year-old waking is the worst because he really doesn’t want to go back to bed).I am giving this 4 stars because it does work and I am sure for those babies that are not as difficult as mine (he wants to eat a ton and still wants to eat in the middle of the night no matter what we do) this will work wonders. I obviously can’t give it 5 stars because it doesn’t work miracles and put my son back to sleep. It also is a little annoying that it is motion sensitive and that keeps it on for a while since my son likes to flip around a bit.Overall, I highly recommend this to parents of little babies who are learning to sleep in their own crib and need a little extra help.Update: The batteries died after about 2 weeks of use. Partly because I would forget to turn it off in the morning and it would turn on sporadically throughout the day. So, remember to turn it off when it isn’t in use.

This is a miracle worker. I put this under the crib mattress and I was a little convinced that it wouldn’t calm my fussy baby but it did! I was further convinced that the baby wouldn’t be able to even feel the vibration through the mattress but I was wrong. I have a fussy sleeper so the fact that this vibrates and plays white noise is a lifesaver. I especially like the heartbeat sound because it’s soothing and closest to comfort for the baby. Both the remote and the cry activation features work like a charm.Construction is sturdy, it requires 4 AA and 2 AAA batteries. The fit is perfect there is no hang over and it doesn’t interfere with the dust ruffle on the crib at all. The sensor comes out from the bottom so the baby can’t reach out and grab it at all. I highly recommend this product, especially for a colicky baby.