I love broody hens, especially when I've specialty eggs to hatch. They do all the work. I usually move them to a large dog crate or one of my Rabbit type hutches and give them fake eggs to sit on to make sure they will settle. I had two hens recently go "unbroody" after I moved them. Once they settle, I still let them sit on the fake eggs anther day, before putting the real deal under them.
I just had all 3 of my English Medium Chocolate Orps go broody at once. Two were in one nest and one in the other, they kept rolling the eggs (stealing them) and putting them under each other.
I ended up getting one of those IKEA toy boxes that you assemble, but they are only like 14 bucks - cheap compared to the nest boxes at the feedstore. Turned it on it's side. Gave them 10 Eggs I bought from ebay and they hatched 7 chicks, now their co-parenting the chicks--they all sleep huddled together with the chicks under them. I'm actually surprised that many hatched, the way they were rolling the eggs back and forth, too cute! lol Now Rowdy my Rooster is helping out too.