I am the CX advocate police lately. I am really saddened to hear all the negative comments about the hybrid. They are not disgusting birds. They are active, friendly and inquisitive things. They are very food motivated. VERY much food motivated.
If you can not free range, a tractor is advisable. Move it daily. DO NOT crowd it. Only feed twice a day what they can eat within 15 minutes or so. Sure it takes them a bit longer to grow out, but they really work to get that extra food from what nature has to offer them. This makes a healthier meat bird in the end.
They don't smell any more than any other chicken. They should not sit in their filth unless they are living in deplorable conditions.
Try electric netting and make a paddock. They will thrive.
I love the CX, and they will always be a part of my farm.

CX birds free ranging @ 6 weeks.

and at 12 weeks.