Product review (5 stars): Save yourself some money on plumbing bills
With HE detergent, bleach and aggressive wash cycles, strips and thread of fabric are bound to end up in the drain.  In our particular application, this was causing backups where a laundry tub drain, toilet drain and shower drain converge.  This lead to numerous expensive plumber visits.  Considering the costs involved, I would suggest getting these in addition to a drain cover a multi-layer defense system.