Really the doors are fine.  They are made of particle board and the workmanship on the fit and finish are just OK.  I think that the paint will most likely fail within a few years.  The hardware that comes with the doors is terrible.  The piece at the floor is a safety hazard and is ugly.  The rollers are barely able to support the weight of the doors without deflection.  This causes the rollers to bind if they are opened too quickly.
The market sucks for these types of doors.  It is expensive and quality is lacking.  These doors are on par with other doors in the market at similar price point.  Quality in 2017 is more expensive than these doors.