Berbatov, having fallen out of favour at Manchester United, joined Fulham on transfer deadline day in August, becoming manager Martin Jol's most high-profile recruit of the summer.
A day later, the 31-year-old Bulgarian striker made his debut as a substitute, since when he has scored five goals in seven starts, and Pulis - whose side host Fulham on Saturday - has no doubt Jol has made a very shrewd move.
"He is a good manager and he is very well respected around the country," Pulis said of his counterpart.
"Fulham have some good players and I think Berbatov has been the outstanding buy for them. He is the glue that knits it all together.
"He looks as if he is really, really enjoying himself, having found a home where he is the main player. Looking at him, he is just showing the class that he possesses."
Asked if there had been a better signing made by a Premier League club over the summer, Pulis said: "It doesn't look like it at the moment."
He added: "I think our supporters will see one of the best players in the Premier League on Saturday on the ball. He can win games by himself and has been a great signing for Martin.
"Berbatov is one of the outstanding players in the Premier League this year. It is worth the admission fee just to see him play."