We have ex batts, since July last year.
It's amazing how quickly they start scratching around and acting like 'real' chickens, even while they still look like very sorry specimens.
As leafbird says, if it rains, pop out and make sure they have headed inside their chookhouse, same in the evening - when it starts getting dark, they may not twig that it's time to go inside and may need a persuading push. Ours have learnt to do this themselves now, think it didn't take very long at all.
We haven't clipped the wings of ours. Apart from a couple of forays out of their enclosure by way of the compost heap ( flappy leap up onto compost heap which is in their enclosure, then tumbly leap off heap onto rest of garden) they have stayed where they are. But our garden is pretty enclosed, so they couldn't get very far!
Be ready for some wobbly eggs. One of ours regularly produces 'Klingon eggs' with quite thin and very wrinkly,lumpy shells - although she's on the same food etc as the other 2. Also, don't be surprised if not all of them lay all of the time. They can be pretty egged-out after their start in life, and a reduction in laying is usually the reason the battery farm are getting rid of them ( it ain't a sudden attack of conscience...)