Elixir coffeehouse on 15th St (207 S. 15th) has been open more than a month now and I have to say every espresso I have had there has been absolutely the best in Philly. Short, thick, intense ristrettos only. And the cappuccino is equally superb. Latte art is present in every cup.
The staff is all very friendly, pastries are delicious and the ambiance is just right.