Yes, they are great. We didn't use one of the special co-sleeping ones because they are pretty small and don't last long (and they're pretty expensive to not last that long). All my friends' babies outgrew them by 3 months. We got an IKEA cot and took the side off and attached to our bed. It was by far the more affordable option and it would have lasted pretty much forever if we'd wanted to keep using it. Our daughter is 2 now and by probably a year she slept in a big family bed with us, but she would probably still fit in it if we had wanted to keep using it.