The show has had a good start with great special effects and production values. But it shows signs of bad writing that could kill the series. The writers need to pay special attention to Barry's unique powers. Scenes where the bad guy is able to aim and shoot Barry while Barry sees them make no sense. Monologing is especially silly. Just hesitating a second is enough for Barry to run around them and knock them in the head. If the villain doesn't totally surprise Barry, then there's simply no way he can get attack Barry. This would only work if Barry's speed was somehow neutralized or if the villain is impervious to Barry's attack, and Capt. Cold certainly wasn't. Barry would never have allowed him to just walk away from a fight.
If the writers can tighten up the use of Barry's speed and the villains and if they can make his father's case for justice more compelling, this could be a great series. Right now it's just Luke warm.
Also, the attraction between Barry and Iris just isn't there. The two have zero chemistry and no compelling reasons for being romantic. No real connection at all except their shared childhood. In fact this shared childhood makes their romance less of a possibility and somewhat unsavory. They are more like siblings than potential lovers.