Add the impeller mod and you get fast AND consistent feeding.
I am very happy with mine. Its also Intelli controlled so once I get into HROF its spinning 18v with no start-stop that the new gems do.
I compared a brand new gem (before and after the impeller mod) to my X-Rev. One note... the new revs are very quiet.
Gem (before impeller mod but with bent up paddles) averaged 86-95 balls for 10sec.
Gem (after impeller mod) averaged 105-117 balls for 10sec
X-Rev (with impeller but not using intellifeed commands) averaged 133-149 balls in 10 seconds. Watching it "throw" the last few balls into the feed neck is amazing. It could be something I inadvertently changed....but it spins counter clockwise
That made doing the impeller mod a little more work.