Leeds United snapped up Chris Wood from Leicester in the summer transfer window.
Leeds brought in Wood from Leicester City for a fee The Sun report to be around £2.5 million, and Rosler was shocked that his side were able to match such a valuation.
The German boss is delighted that the Whites were able to show such ambition in the transfer window, though, and says that Wood has impressed him greatly since arriving at Elland Road.
"I wasn't sure we could attract a player of that sort of transfer value to our football club, but Mr. Cellino surprised me," he explained. "I think Chris Wood is absolutely suiting our structure of the club. He's an experienced player in the Championship, but he needed to find a home. He needed to find a club where he was the number one striker, where he has a coach who believes in him and will try and help him through difficult periods.
"Chris has absolutely lived up to his responsibilities and from being a squad player at other clubs, he has now become a 40-game plus player for us."
Wood has led the line well for Leeds over the early part of the season, with his robust style roughing up defences across the division.
The 23-year-old has already showcased his quality at Championship level, and it has been a long time since Leeds have had a goalscoring striker that they can rely on.
Wood has already racked up four goals in his first nine appearances, and seems to be going from strength to strength as the season progresses and he fully acclimatises to new surroundings.
The powerful striker has scored different types of goals as well, including a screamer against Derby County, and he should be in confident mood heading into Leeds' game against Middlesbrough on Sunday.