Comolli sanctioned the much maligned deal to bring Carroll to Anfield back in 2011, but he still feels that the England international has a lot to offer.
Indeed, the Italian holds Carroll in very high regard and he feels that people still haven't seen the best of the 26-year-old.
"I will stick to what I have always said about Andy Carroll," he said. "When he is fit, he is unplayable. When he has been fit at West Ham, he has shown what he can do, scoring goals, making assists, being a constant threat.
"When people say we made a mistake, I'm still not convinced we made a mistake. It's just we haven't seen the best of Andy Carroll because of all the injuries."
Carroll is currently enjoying his longest run of fitness in recent times and he has benefitted from regular game time.
The former Newcastle United man has been edging closer to his best, with his aerial ability being a key factor in West Ham's play.
Carroll has scored five goals in 15 matches this term and he will be looking to carry on improving that total as the season progresses.
The Hammers have a lot of competition for places up front this campaign, with Diafra Sakho and Enner Valencia both pushing Carroll for a first-team place, and he will realise that he will only be guaranteed a starting place if he sustains his good form.