Sleeping in my Big Boy Crib

My Dad made a beautiful crib for Ben in addition to the cradle. Chris and I are going to start getting Ben used to sleeping in there as we get ready to transition him into his own room at night. He has been sleeping in our room in his pack-n-play since we brought him home but now we think its time for him to be on his own at night. He took some naps in his crib today and seems to be OK. I check on him often - he looks so peaceful when he sleeps. I let him nap on his stomach during the day as he often falls asleep on my chest after he gets done eating. He sleeps on his back at night when he is swaddled.