The centre only moved to Franklin's Gardens from New South Wales Waratahs during the summer, but he has helped Saints to three wins from their opening four matches of the new Aviva Premiership season, and he grabbed his first two tries for the club during Sunday's 40-25 success at London Irish.
The 28-year-old admits he already feels at home with Northampton and he was delighted to register his first tries for the club.
"I'm still finding my feet a little bit but it's been amazing so far," Horne told the BBC. "It's such a different rugby experience, the tribalism of it, the passion you feel wherever you play, I've loved every moment."
Horne has formed an impressive partnership with Luther Burrell during his short time with Saints and he admits he has developed a great understanding with the England international both on and off the pitch.
"I've just found it really easy on and off the field with him. We're still learning what we're after, but I think we complement each other quite well," Horne added.
Horne will be hoping he can maintain his impressive start to life at Northampton when the Saints take on Harlequins at Franklin's Gardens in their next match on Saturday.