It's the final showdown between The Flash and his future self for control of the Speed Force - with Wally West's life hanging in the balance!
As a regular reader of The Flash, I greatly enjoyed seeing the stakes upped even further and feel that Venditti and Jensen have taken advantage of DC's temporal gimmick to pave the way for what ought to be a climactic confluence of Flashes (yes, plural!).
I would caution new readers to do some background reading to get up to speed with what's going on, as you may find yourselves a tad confused - as the story here is so heavily linked to the current continuity established in the regular ongoing.
The art is very much baseline as far as Booth's Flash goes. Some panels/layouts can take a minute or two to take in, with lighting bolts shooting off in any and all directions. However, I do feel Booth handles the kinetic nature of the title well.
Another solid offering for DC's September gimmick.