I'm kind of mixed on Williamson's run. I like some of the things he's done like further developing Barry's everyday life and friends and the development he's given to the new Kid Flash, but his characterization of Barry tends to make him look like a jerk. I personally like a lot of the new things he's brought to the Flash books like Godspeed and the other force users, but the execution leaves something to be desired. Then there's the fact that DC has kind of left him to dry since he can't use the old Flash family members, Wally is just going to be an unresolved plot point for a while, and apparently he's not even freely allowed to have Kid Flash in the book due to him also being in Teen Titans. I would recommend Flash Year One since I feel that's the best his run has to offer.