Conversation so far:
Who was replaced in Helloween during the 2000s?
Helloween parted ways with guitarist Roland Grapow and drummer Uli Kusch.
Was someone new brought in to replace Kusch and Grapow after they left Helloween?
They were replaced by guitarist Sascha Gerstner and drummer Mark Cross.
Did Helloween release a new album in the 2000s?
Rabbit Don't Come Easy, in 2003.
Did Helloween go on tour during the 2000s?
Helloween completed a successful world tour.

Question: Did they have critical success?
Self-contained rewrite: Did Helloween have critical success in the 2000s?