Sonic Rush Adventure review at IGN.

"While most developers are happy enough with the adage "If it ain't broke, don't fix it", Sonic Team seems to have built its recent career around the concept of "If it ain't broke, meddle with it until it is". Needless to say, when we found out this sequel to the sublime Sonic Rush seemed to jettison the original's finely honed high-speed platform purity in favour of the kind shambolic excess that's dragged Sonic's 3D outings down into the pits of unspeakable horror, we were apprehensive to say the least."

Full Source: IGN