But Hart, who signed a one-year deal for the 2012 Super 15 season, faces tough competition for a place in the 'Tahs starting line-up ahead of first choices Sarel Pretorius and Brendan McKibbon. Despite the challenges, Hart is confident of getting a fair go in his bid to secure a contract extension.
"I'm enjoying my rugby a lot more now," Hart says. "I want to achieve the most I can achieve as a professional player and for me that means securing my future at the Waratahs and playing for the All Blacks - which is what every kid in New Zealand dreams about doing.
"It won't be easy because I'm competing with two other world-class players in Sarel and Brendan for the same halfback spot, but I won't leave any stone unturned in trying to make it happen. I'm still learning about my own game but I'm in the right environment now to take my rugby to the next level."
Having analysed Australian rugby, Hart identifies a lack of depth at junior level compared with the under-age scene in New Zealand.
"Australia doesn't have the same depth of talent because of competition from other sports," Hart says. "Club players in Sydney are not full-time professionals whereas in New Zealand we've got provincial rugby (NPC) which makes the transition to Super Rugby a lot easier because it's not such a big jump in standard. But the standard of Australia's Super Rugby teams is definitely on a par with their counterparts in New Zealand."
He adds: "I've enjoyed training with my Waratahs team-mates, they are tough sessions but all of the guys support each other and it's a fun environment to be in."
Hart's only complaint is Sydney's unseasonably wet summer - something which visited him again in Auckland for his trip home to see family over Christmas and New Year.