They replaced an above ground deck for us, which was 3 to 4 feet off the ground. They did it in a composite, and it was maybe a medium sized deck. It turned out beautifully. They did great railings, they were very timely, and they stuck to the quoted price.
It ended up being more expensive than they expected, but they did the work anyway without changing the price. They were easy to work with, and I would use and recommend them again. I even told them I'd be happy to show my deck to potential customers if they wanted to see it.