The former Wigan Athletic midfielder admits he's had chances in the past to sign for the Black Cats.
"I wasn't going to go to a team that plays long balls. I always want to play for a team where the manager plays a little bit more football, so I'm really happy to come here.
"The manager has similar ideas and the style is like we had at Swansea and Wigan.
"He will want to get the best team he can. That's good for the team and also the club.
"I don't know if it will be difficult to gel or not. Sometimes that can take a long time, other times it just happens. If you have good players you have a very good chance of having a good season."
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