I love my LG washer/dryer combo. Yes, it takes a bit longer, but it's half the work from my point of view.
I only load and unload clothes once (not twice).
I only program a machine once (not twice).
One big feature my LG has is it will keep rotating the drum a half a turn every few minutes, so you can take the dry, clean clothes out much, much later, and they will not be wrinkled.
As others have said, if you're limited on space in your house it's a bonus. In my case I converted the space that would have been taken up by a second unit stacked vertically into large storage area with shelves.