The Chile midfielder moved to Cardiff in the summer from Sevilla.
"Cardiff City play a different system then I was used to at Boca or Seville," Medel told the Western Mail. "They both had plenty of possession and pass the ball more often.
"We play in a counter-attacking style at Cardiff and we've done pretty well so far.
"Malky Mackay brought me to Cardiff and I am doing all I can to repay his confidence in me.
"In the beginning Cardiff were trying to adapt in a new division and we have been doing that.
"It's important to me that I play well for Cardiff and that is nothing to do with the fee paid for me.
"I train hard to make sure I can deliver, but that is not to do with the money, that's just the way I am.
"Premier League football is highly competitive. It's not like some where only two or three clubs and competing for the top positions. Here you can win a couple and be third - or lose one and drop.
"It's highly competitive and I enjoy that."
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