Big Al's is tucked into a corner of the Rogers building at the corner of Shoup and B streets, downtown Idaho Falls. If you didn't know where to look for it, you may miss the relatively small signs ~ one on the north end of the building, and a few small signs in the windows.
It might be easier to just look for the signs for The Cinnamon Bear - they're easier to see - and go in the building past that and you'll find yourself in Big Al's dining area.
Anyway - Big Al's caters to the breakfast and lunch crowd, being open only from 7am to 4pm, monday to friday....
The food is good, prices are very reasonable and the staff has always been friendly and cheerful.
It's definitely worth looking for if you find yourself in the area around lunchtime.