as a professional master carpet installer, these jobs look really, really good! As a word of advise to some of the layouts that caught my attention, try to make sure the installer lines up the pattern on the risers as best he can. Especially if there is block or square designs. Also, if there are seams involved, please make sure they are all "seam sealed." This will prevent a lot of headache in the future if the seams start to unravel. The ends where the carpeting wraps around an outside corner step.....to prevent fraying, make sure the installer also seam seals those edges as well before final installation.
any questions, dont hesitate to ask.
this installation is a good representation of what i was talking about with lining up the riser with the flat work. Great job installer. Who ever this is, please let their installer know he did a superb job on the installation.