All I can say is "do your homework". I am an 1812 re-enactor and have used many different patterns. I generally have to make modifications to every pattern to get the correct fit and look. I have used the S&S dress pattern and made some adjustments. I will say, when I followed her pattern to make a simple "work dress" it was very easy and comfortable. It may not have been completely historically accurate but not many outside the 1812 community would have noticed.