The Palace winger has, at times, been less than complimentary about his former club but Puncheon has praised Southampton's infrastructure, as well as admitting that his last 18 months with the Saints were very good for his career.
Tomorrow, Puncheon returns to St Mary's with his Crystal Palace team-mates for an FA Cup clash, with his side hopeful of continuing their impressive run under new boss Alan Pardew.
But the 28-year-old certainly has no ill feeling towards his old club and is looking forward to facing Southampton.
“The last 18 months there were really good for me and Southampton had a big and positive impact on my career,” he told the Standard.
“They always had the infrastructure in place to get back up and the position they are in now is testament to the whole club.”
Little needs to be said of Southampton's impressive season so far - the Saints sit third in the Premier League table.
Crystal Palace under Pardew, though, have won two league games out of two, as well as an FA Cup clash at Dover. Ronald Koeman's side, meanwhile, were knocked out of the Capital One Cup by Sheffield United, showing that just about anything is possible in knockout competition.
The fourth-round clash gets underway at 3pm tomorrow afternoon.