I have 2 Schwintech slides which have performed trouble-free during their first year of use. I read somewhere...can't remember (darned sometimers!) that it is important to keep the worm tracks clean of debris. If you google "Schwintech slide" you'll get quite a bit of info.
'06 2500 Silverado 4X4, Duramax LBZ Diesel, Firestone air bags
'08 Tracker Pro Guide V-16 Boat
'12 Pinnacle 31RLTS