Yes we have gone this route, we have a small backyard (now a Courtyard) which was all concrete. We were originally going to slab it with reclaimed limestone / gritstone slabs then we decided to go down the artificial grass route. The cost per sq metre increases the better grade of grass you buy, to prepare the yard I put a bed of sharp sand down approximately 5 cms deep, you then lay the grass as you would a carpet.
You do need to deodorise / water it if you have got a dog. You can use the Hoover on it to pick up any leaves etc, apart from the deodorising we had to buy a piece slightly bigger than we wanted. Would I recommend it ? Yes, over last month or so we have been enjoying eating al fresco at least 4 times a week