I had always heard about benzo w/d and until I had gone thru sudden wd's from stopping Lyrica, which one can argue is or is not a benzo, I experienced what everyone describes as the classic, tell-tale benzo like wd's. My head was foggy, I was unable to find motivation and energy to do anything, and mood was generally very down.
I found this to be far worse than the physical monster that is Opiate WD. To me that is 14 days of physical warfare, followed by 2 months of boredom. But the lyrica/benzo-like withdrawal easily took the cake.