It is an interesting premise to have a world with Flash as the main superhero. Not having read the original Flashpoint mini-series is definitely a handicap to fully appreciate the story line.
I found the first issue to be the best. It seemed that the three issues do not follow a clear continuity, you need to read the other Flashpoint one-shot issues to understand what is happening in the other two issues if the main Flashpoint mini-series. And even though the art for all three issues is by Andy Kubert, the first issue did look a lot better than the other two.
Now I have to read all the other Flashpoint one-shots to appreciate the story line to its fullest.