I had my Lee Challenger press (one of the original anniversary kits) for about two years when my son broke the toggle linkage, sizing some .300wby brass. Flipped them and kept right on going for about a year, when I broke the good one, again sizing rifle brass (this time, a .300wm). Called Lee and they cross shipped the two pieces. My only cost was the postage to ship them the broken parts.
Got to thinking, and ordered another set from Midway. Haven't broken the replacement set, but I have another set ready, just in case.
Since then, I've read (here and elsewhere) that the toggle linkage is the weakest part of this press. I agree.
In the meantime, I've gotten the Classic Cast and save the Challenger press for decapping and seating.
All in all, I've been happy with the results from my Lee presses, their customer service and response time.