Summer hours are a little shorter than usual (they close an hour earlier), but are still long enough for a midday coffee break (you know, like the one you need around 2PM after inhaling a huge lunch at noon?).
They also have lunch items available between 11-3PM on weekdays. Although I haven't tried all the options, the options that I have tried have all been pretty good - at least when compared to most cafe foods.
For those of us working in the medical sciences center across the street, Aldo's is a blessing. The brightly-lit cafe with a high-ceiling is definitely a welcomed reprieve from the cramped quarters of a typical lab.
Remember to check in on yelp for 10% off their frappes!