The one down side to a blob is that shooting arrows with field points removal of the arrow is really difficult. Even with an arrow puller, it is still hard. I have used a rag bag and a Morrell outdoor range target for years and have had no problems. I have bought a new cover bag for the Morrell one time. It is up off the ground and has lasted for about 10 yrs.
A buddy loaned me his Blob while he went through a house move. The Blob literally sand blasted my field points and fixed blade broadheads to where they were shiny. Kinda cool.