I saw a stray mention of this place on this board and wandered in tonight because I'm staying nearby. It's located just opposite Estacio del Franca in Born. The place really gets going at about 8:45, though it opens earlier, and they bring out a nearly continuous stream of fresh and inventive hot pintxos that is, I think, the most varied in Barcelona. Taktika Berri might have an edge on overall quality, but this place offers more variety. I highly recommend trying their pintxos if you're down this way at around 9pm.