There were numerous hard glue spots throughout the rug.  Uncomfortable to step on in bare feet.  This was a 9x12.  I returned the first one because of this issue.  When the second one arrived with the same issue, I decided to keep it because I like it otherwise and spent a while picking it out.  However, I do not recommend it.  I also bought a 2'3"x4' of the same rug and it did not have this issue.