Just watching Pedro for cartegena, he's playing as the left wing forward rather than fullback.
Defensively, he doesn't look capable to me but it could be his tactical instruction. He seems slow to track back and his reaction speed to danger is disappointing. More or less, he defends like Arshavin and you would expect more from a player who plays fullback sometimes.
Going forward he looks class, great first touch, good short passing game, always on the move to test the backline. He's quite slim for six foot two but has good balance so can hold off challenges. He doesn't compete in the air very well for someone of his height. On the plus side he looks agile and comfortable rather than someone like Bendtner for instance who seems to lumber and struggle with his size. He's fast, not lightening like Theo but maybe Clichy sort of pace (it's hard to tell given the opposition).
And most importantly, one Pascal Cygan is his teammate.