I first went to Cartel over the summer and was impressed more with the concept then the execution. The bar was just inside the entrance, the loungey area nothing more than a couple of sofas. Plus I don't drink coffee and they didn't have much else.
Went back for the Yelp Office Hours this month and am a new fan. They've moved the bar to the center of the space and the open space makes all the difference. Also have quirky art around the walls, some nice tables and the same sofas which now seem more inviting.
Add free wi-fi and hot chocolate to this list of praises and I've found a new "escaping from work, but still working" place.