The former Malaga midfielder made the move last summer.
"It was a very important decision, to change teams," he told arsenal.com. "It is a new challenge, it is a completely new adventure from the start, you have to start from zero, aside from the fact of going into a different culture, a new league, a new language.
"But I think that with Arsenal, I was offered an opportunity that I could not turn down, being 27 years old [at the time], it was like a train that I had to take, and I am very satisfied.
"I am learning a lot, I am adapting more and more as days go by, and my aim is to learn the English game, and hopefully I will spend some good years at this club."