Allen linked up with Rodgers again earlier this summer in a £15million deal from Swansea.
The classy midfielder has impressed at Anfield during the early stages of his Liverpool career and Rodgers believes Allen will only get better over time.
"I think it's remarkable how quickly he has settled," Rodgers told the club's official website.
"This is a young guy who has moved up from South Wales, he was first of all into a hotel then having to move into an apartment. His partner, Lacey, is giving birth to her first child.
"All of these emotional things have been going on in the background yet he still has come in and made the performances that he has done.
"Is it a surprise to me? No, because I knew what we were paying for and I know the boy's qualities. I think the biggest testament that you can give him is that he has come into here and he looks like he has been a Liverpool player for the last 10 years.
"That's great credit to him, and I think you see the supporters are recognising that he looks like a player who is a Liverpool player, because of how he passes the ball, his courage to get on the ball, but also his willingness to put his body on the line for the team and for the club.
"He has been outstanding and he will only get better."
One of the top soccer cleats for control the Nike CTR360 will not let you down on the field in tight spaces.
The adidas Nitrocharge is the most talked about new cleat in years. It was released on May 15 and will take your pitch by storm.
Chelsea won the Europa League on Wednesday. The Blues defeated Benfica 2-1 on injury time goal from Ivanovic.
The Juventus jersey for the 2013/14 was released earlier this week. Be the first to wear the colors of the Old Lady.
The new PUMA evoSPEED 1.2 FG. A great new soccer cleat with classic look and first time for PUMA to be on the cleat.
Borussia Dortmund hears Wembley Calling and are headed to London for the Champions League final.
Bayern Munich are kings of Germany and hope to be crowned kings of Europe at Wembley later this month!
The push for more color on their cleats, adidas has added the infrared colorway to the adiZero f50 Line.
adidas has added some color to the Predator line with this new colorway. Released on May 17. Be the first to own a pair.
The Liverpool 2013/14 soccer jersey is available for pre-order. The Reds are eager to compete for silver next season.