The Lee is a decent press that combines a lot of expensive features into a dirt-cheap press, but you really have to understand the mechanism to keep it running smoothly. I loaded 6000 rounds before moving to the Hornady. If you can afford better, do so, but it'll produce good quality ammo, relatively quickly.
My suggestions are:
Make sure the primer feed chute is always packed with primers
Periodically spray powder out of the works with compressed air
Keep the powder measure well lubricated with graphite powder, Flitz polish the piss out of your output chute and the case feeding "plank", cap the powder with a bullet as soon as it exits the measure.
If you mount the press on standoffs, you can insert a tray below to hold spent primers.
Drill a hole for a paperclip on the primer flip tray output chute, to hold primers back, as you insert the tray into the press.
Get the collator. It's disproportionately expensive for what you get, but the functionality is worth it. Implement the "penny" mod. It disappoints me that my Hornady case feeder is less reliable than the Lee $0.50 (well, $0.51) solution.