We have both manual central lube systems and auto lube systems installed on some of our machines at work. Both work well but I prefer the manual lube, as long as the operators remember to use them at the start of their shifts. The issue I have with the full auto lube system is over greasing. Apart from them supplying grease at their timed intervals they also supply grease when they are powered on to start their cycles so this means that every time we have an emergency stop situation with either a light guard being broken or collision sensor operating the auto lube restarts it cycle when the power has been restarted. We can have quite a few extra grease operations during shifts.