Not all that it claims!
It does a pretty horrible job on edges and corners. Great for touch ups or thin sections of wall i.e. between a door frame and wall corner (if the space is wider than 3.5 inches). If you need an edging roller, this is definately NOT what you want to buy unless the adjoining surface area is going to be the same color as it will splooge over to the other side.
caligoddess
Pasco, WA