As far as our experience in dealing with Modbox I would say it has been a very positive experience. To me it seems like you have a very organised approach to your projects which makes it re-assuring from a client point of view. Front end communication was quite detailed and planned a long way out.
It is warm and we think it is luxurious. One of our concerns was noise transfer compared to gib but it just has normal noise levels in the home. The girls love nailing peg boards etc in their rooms for decorative purposes. The ducted heat pump system makes the whole house warm and helps transfer moisture out of the home.
Super happy with the place. Main thing is it is warm and efficient to heat.