These are by no means great sports bras.  BUT they are worth having as "comfort" bras and work for very low impact workouts (they're fine for the elliptical and weight machines but are terrible for an aerobic class).  They do a fine job staying in place while you exercise they just don't have tons of support.

They're five bucks a pop, so to keep extras at work or to wear around with PJ's if you are around others these are perfect.