Of course, I've had coffee at Starbucks. I think we all have, at some point in time. But this place is so much better. The coffee itself is less bitter than that at Starbucks. I've found it to be smoother and more flavorful without the burnt taste so often present in the venti/trente/blah fritalian sized drinks.
In addition to coffee, this place has fabulous tea. While Starbucks give you only a few choices, Coffee Bean & Tea Leaf gives you a huge choice of tea, fresh brewed to your liking.... From English Breakfast, to Irish Breakfast to Scottish Breakfast to a few choices of green tea and simple black (ceylon) tea.
If you're looking for dense bitter coffee that has a bitter aftertaste, by all means go to Starbucks. If you're looking for superior coffee and tea, then swing on by and give this place a taste.