First off "Master Tailors" is not only in name but their professionalism and quality of work. They service many well-off folks in Yorkville who come in spending thousands of dollars on a custom suit but when I walked in there was not a single hint of snobbishness. Very friendly folks.
I had taken an indochino suit here to get it tailored and they gave me amazing advice and measured me even after I decided to take my suit back and get it re-made rather than tailored. This guy went as far to edit all my measurements and offered suggestions so that there would be less of a chance I would have to get it tailored after the remake. "Not a competition, I just want you to have a nice suit." sums up their approach to you as a customer. I will bring every piece of clothing that needs to be tailored to these fine folks in the future, including my remade suit if it needs any fine-tuning alterations done.
Note: A quality job from a busy tailor will take longer than 1 day, just saying.