Schwintek was a great system until Lippert laid their hands on it in 2010, and like everything Lippert does, proceeded to cheapen everything up and overprice the repair parts.
The Scwhintek system is dependent on having slides perfectly built, perfectly aligned, and the system itself installed perfectly and in alignment. Good luck hitting that trifecta with any of these RV manufacturers. But if you do you'll most likely never have a problem unless its on a large deep slide.
Lippert acquired Power Gear in 2014 They'll cheapen that system the same as they did with Schwintek if it hasn't already been done.