The Spain international has committed his future to the Reds for the next six years, having established himself as a key player in Rafa Benitez's side since moving from Villarreal in 2005.
And Reina insists he had no concerns about putting pen-to-paper, despite Liverpool's current standing in the Premier League.
Liverpool appear likely to qualify for European competition next season but are struggling to finish fourth.
Reina would therefore have to miss out on the excitement of the UEFA Champions League but he maintains that he is completely satisfied at Anfield.
"I am really happy at Liverpool," he told the club's official website.
"The supporters and the club are also satisfied with my performance and attitude. That is why we have agreed six more years and I am very pleased.
"Everybody wants to play Champions League because it is a great tournament but there is a league as well to play in next season and probably a European competition as well.
"It does not matter if we play Champions or Europa League in terms of making a decision, it is just to be at the right club and Liverpool at the moment is the right club for me."