Would be a good signing, I'm sort of a freelance for the Bundesliga so see a lot of him as I'm sure a lot of us did against 'Gladbach. Would add some much needed tenacity to our often mundane midfield, although it is an area he would have to work on with his disciplinary record. Plus, he has been basically issuing a weekly "come and get me plea" to Pep.
Also got a good long shot on him, if I recall right search for his winner against Koeln in the derby last season. I think it was him. Something we don't often see, or perhaps possess (although Fernandinho and Toure do seem to be alright in this regard) and hopefully Pep could exploit.
Infact on looking that up, it was a header he scored against Effzeh but the point still stands. I'll attach a video showing his long shots though, sorry for the terrible music etc.
Here's his one against Koeln.