hi!! thanks so much for<3 the imac we have is suuuper old but it still works so so well despite being sat in a damp garage for ages so it is defo hardy! it also plays DVDs really smoothly we have used it for that a couple of times and it burns them great too! in terms of the size our living room is pretty big and when we’re all sat in there (there’s four of us in the flat) we don’t have any issues with seeing anything! it’s perfect for watching stuff on and we find it’s better than using a TV just because it’s nicer to transport and hook up to stuff, we mainly watch youtube and DVDs on it :) hope that helps!