I have been getting ready to order an amby myself and was really pleased to see all these answers as I also have wood floors with carpet bedrooms. We are having a cot given to us for later use but I also like the sound of using it mainly as a safe alone space. I mentioned the hammock to the midwife and she had never heard of them and said I should phone kidsafe so see if they are recomended or not. I have checked out the website and they definately have all the checks and measures so I am quite confident.
My one and only negative it that they are so much more expensive than a bassinette but I guess they are useful for a much longer time and also as a jumper later too! also for the baby that wont sleep in a still bed much cheaper than a rocking mechanism thingy you put on their normal bed.(our friends had to sleep upright in a chair for months with their little boy).
Also, I am thinking of taking it into the hospital to be used right from the start... what will they think?