The mobile my sweet little guy has works really well, but I will say that some reviews on other sites report that people have had problems with the light at night not working, or the mobile making clicking noises. I imagine that any mobile on the market will have some people writing negative reviews, and of course I can't guarantee that your mobile will work perfectly. But I can guarantee that compared to many I've used, this one sounds nice, has features that make it great for the NICU, is reasonably priced and is probably worth a try! After many days taking care of this sweet little guy, I'm still loving the mobile, and he is too.
AS ALWAYS, if you have any doubts about whether you can use a mobile for your baby or not in your NICU, please ask them first. But I still think this could be a great buy: If your baby is too young for the visual stimulation of a mobile, the unit can be used with the arm detached for just playing the lovely sounds. If your baby might be ready for slightly more visual stimulation, the arm can be set in place but not locked in completely, so the plushie "friends" don't spin. And if your NICU just does not allow the mobile at all, (talk to their director!!!) this mobile will still be a wonderful one to use at home.