Toivonen joined the Black Cats from Rennes on loan during the summer transfer window, and he has been thrust straight into the starting line-up.
The Swedish international has already played twice, and Quinn has been impressed by what he has seen from the attacking midfielder, and some of Dick Advocaat's other new recruits.
“Toivonen looks a player who can really help," he said to the Sunderland Echo. "(Fabio) Borini had his debut. There were so many positive things there for them. Kaboul and (Yann) M’Vila in midfield too."
Toivonen is a player who is adept at playing in midfield or up-front, and his goalscoring threat is something which could aid Sunderland hugely.
The North East outfit struggled to hit the back of the net last term, and Advocaat has worked hard on increasing their attacking threat this time around.
During his time with Rennes, Toivonen scored 14 times in 46 matches, and a repeat record would be very welcome at the Stadium of Light.
At the moment, the 29-year-old is still looking to open his account in English football, but his next opportunity to get on the scoresheet will come on Saturday, when Advocaat's side take on Bournemouth.