I have seen one in action and that is one of the things that kind of "freaked me out" about it really. There is a whole lotta movin' goin' on all the time. The only other thing that is a minus in my opinion is that the tool head is nonexistent. I know there are bushings but, if I count right, that is a minimum of 5 movements to get them out. 2 pins on the XL650 and you are done UNLESS you don't purchase an extra tool head. $15-$20 used through ebay.
Just sayin'......................
Both are great machines and capable of producing a bunch of quality ammo in a hurry. Neither one should be put down. They just have differences is all. The ONLY thing that makes one better than the other is personal preference, period.