I've never sailed an Ezzy Infinity in any size, so I cannot comment on whether or not it's a "good" sail.
It should be big enough (@ 9.5 m2) but I have no idea on the weight, performance, durability, etc.
I've sailed with a few people who have large Ezzy Infinity rigs, and they seemed to be going OK.
Not the fastest, not the slowest, not the earliest to plane, not the latest to plane.
Just don't know what to tell you as I've never sailed one.