I had the old Lifetime glider for many years.  The old one was grey plastic and held water in the grooves after a rain.  I ordered this one because the old one began to rust.  This one seems to be very high quality and arrived undamaged.  The bars with the a bearing on each in have to be installed the correct way.  The illustration is not very clear and I installed mine backwards which made it bind.  When I reinstalled them correctly it worked great.