I did not find "the guy" to be nice at all. He was rude and inattentive for no reason whatsoever. Then, the price was $40 to fix a zipper--a bit much. I agreed to wait a week for the work to be done, as he said it could not be done any sooner than that. Finally, when I came back a full week later to pick up my jacket, he had not finished yet! I had to wait another 5 days to get it.
If you live in the area and are looking for a good tailor, go to Do's in Georgetown. She's great.