IMO. It's a complete waste of time and money. Yes, you'll get a better oxygen exchange until the holes fill back in, which is shorty after a heavy rain. In our heavy clay soils one of the only times to do it is if you're going to top dress(backfill those holes with sand) It's more of a northern thing with overseeding. I've done it once a few years ago and it was a waste of time and it did nothing. It has it's places but if you live in the DFW and a lot of TX it's not needed. It might make you feel good that you did it, but at the end of the day it did nothing,and feel good is how most products/processes are sold nowadays.