The 26-year-old, who has started all three Premier League games in the absence of Luis Suarez, said that football in England is much more physical than in his native Spain.
"I would tell any player to go to the Premier League," he told reporters. "You get a different feeling – especially compared to Spain.
"It's the first time I've left home so that's been hard, but things are going well. I'm very happy, especially because we are leading the league. It's only been three games though, and it's a very long competition.
"I'm playing a bit further back that it did at Celta, but the big difference is how physical the league is compared to Spain."
Aspas scored 12 goals in La Liga last season.