quick lift by ranger

who has purchased a 5000# Quick-Lift by Ranger (Bend-Pac) ? What do you think of it? Any complaints or improvements needed? I am thinking about buying one, but thought I would ask those who have one "Would you buy it again?"

http://www.bendpak.com/BL-5000_QuickJack_Portable_Car_Lift_Track_Jack_System.pdf

http://www.bendpak.com/BL-5000_QuickJack_Portable_Car_Lift_Track_Jack_System.pdf