My favorite spot for alterations. The owner is incredibly kind and does great work. He takes my shirts in from the sides, rather than messing up the pattern in the back, and uses the original hem on my jeans, rather than making a new hem (which I've had some places do and it looks ridiculous).
There's a small changing room in the store which makes it less awkward than other dry clean/alteration shops.
Anything on this stretch of Eastern is a little crazy to get into/out of but it's worth it if you need something tailored.