Bought my Rockchucker in 1980, no idea how many rounds have been done on it since then. I have a MEC Marksman and a Co-Ax as well. I do like the Co-Ax better than the RC for many things, die install, universal shellholder, leverage. But, there are things that work better on the RC, Co-Ax is fussy about rim thicknesses, ie;218Bee, and I had a 450-400NE, that the jawas simply would not handle. I figured after 40 yrs, maybe a new press would be nice to try, picked up the MEC, no beefs with it, although some may want the bushing in the top for quik change inserts, or the ability to seat primers, I can live without those. The MEC is definitely nice to operate, super smooth, primer disposal and the floating shellholder are nice. I still do bullet pulling, and stuff like some heavy bullet sizing on the RC.
I think where all the pissin on Lee comes from is the aluminum versions, they can spring under heavy load use, think the Classic Cast is steel? Same thoughtline as a C press, maybe a turret, as far as I can see. Unless you are working those extremes with them, they'll make ammo as good as the next one. Pretty sure the Chinese RCBS casting story got disproved, someone from RCBS put out an answer or a memo on it years ago, they said it didn't happen, forget all the details now, but, rumours like that aren't difficult to start & propagate in the US, are they? Maybe the handle is questionable on a Summit, first reviews talked about the head cocking on the main slide, see a batch of bad castings on them out now, that can happen to anyone. Then you get the FA M press, just poorly finished, not a great design on the shellholder area and issues with the die blocks, but it functions for the most part, just avoid stuck cases with it. Co-Ax isn't really any different on that point, universal jaw setups have limits.
Nuthin's perfect, but, the RC is certainly close to it for the most part, it works the way it's supposed to.