Don't be scared off by its location.  This is a gem of a place.  No pretenses, no frou-frou...just good Thai food.  The family that runs the establishment is courteous, professional, and will go the extra mile for any requests within reason.  It's a hole in the wall, but they keep busy.  The only downside is that they aren't open on the weekends.  They do well enough during the normal work week that they don't have to.  That's saying something.